Screen black after booting (backlight still on)

My iBook g4 12" 1.33 Ghz doesn't want to boot into the system.
1. Start computer (chime sound)
2. Apple logo on grey background appears
3. Spinning wheel below Logo appears
4. Screen flicker, big vertical zigzag appears, black screen (backlight is on)
5. Shift key work (led on/off)
6. Num Lock key works (led on/off)
7. no responses with any other keys on keyboard
What I tried so far
1. Reset PRAM & NVRAM & PMU
2. Put original installer disc in, press C start from DVD - same as above happens
3. Boot from external hard drive with operating system over Firewire - same as above happens
4. Mounted iBook drive as external drive with target mode - Other computer boots fine with iBook drive
5. Attached an external monitor, which doesn't get a signal
6. Run Hardware test over DVD - Diagnostics all fine (Screen fine all the time, running through all diagnostics)
7. Tried pressing on the graphic chip, as some forum entries suggest - didn't change anything
8. Start in Safe mode with shift key - no indication that in safe mode, same faults
9. Start in single-mode (see image http://www.somethingonline.org/dl/pb/singlemode.jpg)
Don't know what else to try
Any help appreciated

Since you're able to boot into single user mode the run fsck, so at the command line type the following:
/sbin/fsck -fy <then press return>
Then try to reboot, if it still does not help try booting into Open Firmware and manually reset the PRAM, hey it's worth a try!
Power-on Mac and immediately press and hold "CommandOption+OF" keys simultaneously until the ok prompt appears. At the ok prompt type the following:
reset-nvram <then press return>
reset-all <then press return>
The reset all should reboot the Mac if all was reset ok.
Hope this helps.

Similar Messages

[SOLVED] nvidia driver causes blank screen soon after boot

Hi,
I have a NVIDIA 560 and was originally using the nouveau driver, but that gave slow performance when doing anything (eg. resizing windows), so I installed the nvidia driver instead by following the wiki section:
https://wiki.archlinux.org/index.php/NV … au_drivers
by essentially just following the scripts given there. After switching to nvidia, the screen goes blank soon after boot. I get back into the system by using nomodeset in menu.cfg.
My question is how do I even begin to find the problem, eg. what log file(s) should I look in and post?
Thanks
Last edited by mark1977 (2012-08-19 17:38:42)

Yes it's the 560 Ti. Thanks I just installed straight from the repos. I've also installed cuda-sdk and cuda-toolkit. I've compiled the libraries inside /opt/cuda-sdk/CUDALibraries fine.
No I go to compile the sdk examples by running make in /opt/cuda-sdk/C and get the following error:
# make
make[1]: Entering directory `/opt/cuda-sdk/C/common'
make[1]: Leaving directory `/opt/cuda-sdk/C/common'
make[1]: Entering directory `/opt/cuda-sdk/C/common'
make[1]: Leaving directory `/opt/cuda-sdk/C/common'
make[1]: Entering directory `/opt/cuda-sdk/C/common'
make[1]: Leaving directory `/opt/cuda-sdk/C/common'
make[1]: Entering directory `/opt/cuda-sdk/shared'
make[1]: Leaving directory `/opt/cuda-sdk/shared'
make[1]: Entering directory `/opt/cuda-sdk/C/src/newdelete'
make[1]: Leaving directory `/opt/cuda-sdk/C/src/newdelete'
make[1]: Entering directory `/opt/cuda-sdk/C/src/simpleTextureDrv'
/usr/bin/ld: cannot find -lcuda
collect2: error: ld returned 1 exit status
make[1]: *** [../../bin/linux/release/simpleTextureDrv] Error 1
make[1]: Leaving directory `/opt/cuda-sdk/C/src/simpleTextureDrv'
make: *** [src/simpleTextureDrv/Makefile.ph_build] Error 2
The Makefile itself essentially seems to just include the file /opt/cuda-sdk/C/common/common.mk, which is:
# Copyright 1993-2011 NVIDIA Corporation. All rights reserved.
# NVIDIA Corporation and its licensors retain all intellectual property and
# proprietary rights in and to this software and related documentation.
# Any use, reproduction, disclosure, or distribution of this software
# and related documentation without an express license agreement from
# NVIDIA Corporation is strictly prohibited.
# Please refer to the applicable NVIDIA end user license agreement (EULA)
# associated with this source code for terms and conditions that govern
# your use of this NVIDIA software.
# Common build script for CUDA source projects for Linux and Mac platforms
.SUFFIXES : .cu .cu_dbg.o .c_dbg.o .cpp_dbg.o .cu_rel.o .c_rel.o .cpp_rel.o .cubin .ptx
# Add new SM Versions here as devices with new Compute Capability are released
SM_VERSIONS := 10 11 12 13 20 21 30
CUDA_INSTALL_PATH ?= /opt/cuda-toolkit
ifdef cuda-install
CUDA_INSTALL_PATH := $(cuda-install)
endif
# detect OS
OSUPPER = $(shell uname -s 2>/dev/null | tr [:lower:] [:upper:])
OSLOWER = $(shell uname -s 2>/dev/null | tr [:upper:] [:lower:])
# 'linux' is output for Linux system, 'darwin' for OS X
DARWIN = $(strip $(findstring DARWIN, $(OSUPPER)))
ifneq ($(DARWIN),)
SNOWLEOPARD = $(strip $(findstring 10.6, $(shell egrep "<string>10\.6" /System/Library/CoreServices/SystemVersion.plist)))
LION = $(strip $(findstring 10.7, $(shell egrep "<string>10\.7" /System/Library/CoreServices/SystemVersion.plist)))
endif
# detect 32-bit or 64-bit platform
HP_64 = $(shell uname -m | grep 64)
OSARCH= $(shell uname -m)
# Basic directory setup for SDK
# (override directories only if they are not already defined)
SRCDIR ?=
ROOTDIR ?= ..
ROOTBINDIR ?= $(ROOTDIR)/../bin
BINDIR ?= $(ROOTBINDIR)/$(OSLOWER)
ROOTOBJDIR ?= obj
LIBDIR := $(ROOTDIR)/../lib
COMMONDIR := $(ROOTDIR)/../common
SHAREDDIR := $(ROOTDIR)/../../shared/
# Compilers
NVCC := $(CUDA_INSTALL_PATH)/bin/nvcc
CXX := g++ -fPIC
CC := gcc -fPIC
LINK := g++ -fPIC
# Includes
INCLUDES += -I. -I$(CUDA_INSTALL_PATH)/include -I$(COMMONDIR)/inc -I$(SHAREDDIR)/inc
# Warning flags
CXXWARN_FLAGS := \
-W -Wall \
-Wimplicit \
-Wswitch \
-Wformat \
-Wchar-subscripts \
-Wparentheses \
-Wmultichar \
-Wtrigraphs \
-Wpointer-arith \
-Wcast-align \
-Wreturn-type \
-Wno-unused-function \
$(SPACE)
CWARN_FLAGS := $(CXXWARN_FLAGS) \
-Wstrict-prototypes \
-Wmissing-prototypes \
-Wmissing-declarations \
-Wnested-externs \
-Wmain \
# architecture flag for nvcc and gcc compilers build
CUBIN_ARCH_FLAG :=
CXX_ARCH_FLAGS :=
NVCCFLAGS :=
LIB_ARCH := $(OSARCH)
# Determining the necessary Cross-Compilation Flags
# 32-bit OS, but we target 64-bit cross compilation
ifeq ($(x86_64),1)
NVCCFLAGS += -m64
LIB_ARCH = x86_64
ifneq ($(DARWIN),)
CXX_ARCH_FLAGS += -arch x86_64
else
CXX_ARCH_FLAGS += -m64
endif
else
# 64-bit OS, and we target 32-bit cross compilation
ifeq ($(i386),1)
NVCCFLAGS += -m32
LIB_ARCH = i386
ifneq ($(DARWIN),)
CXX_ARCH_FLAGS += -arch i386
else
CXX_ARCH_FLAGS += -m32
endif
else
ifeq "$(strip $(HP_64))" ""
LIB_ARCH = i386
NVCCFLAGS += -m32
ifneq ($(DARWIN),)
CXX_ARCH_FLAGS += -arch i386
else
CXX_ARCH_FLAGS += -m32
endif
else
LIB_ARCH = x86_64
NVCCFLAGS += -m64
ifneq ($(DARWIN),)
CXX_ARCH_FLAGS += -arch x86_64
else
CXX_ARCH_FLAGS += -m64
endif
endif
endif
endif
# Compiler-specific flags (by default, we always use sm_10, sm_20, and sm_30), unless we use the SMVERSION template
GENCODE_SM10 := -gencode=arch=compute_10,code=\"sm_10,compute_10\"
GENCODE_SM20 := -gencode=arch=compute_20,code=\"sm_20,compute_20\"
GENCODE_SM30 := -gencode=arch=compute_30,code=\"sm_30,compute_30\"
CXXFLAGS += $(CXXWARN_FLAGS) $(CXX_ARCH_FLAGS)
CFLAGS += $(CWARN_FLAGS) $(CXX_ARCH_FLAGS)
LINKFLAGS += -L/usr/lib
LINK += $(LINKFLAGS) $(CXX_ARCH_FLAGS)
# This option for Mac allows CUDA applications to work without requiring to set DYLD_LIBRARY_PATH
ifneq ($(DARWIN),)
LINK += -Xlinker -rpath $(CUDA_INSTALL_PATH)/lib
endif
# Common flags
COMMONFLAGS += $(INCLUDES) -DUNIX
# If we are enabling GPU based debugging, then we want to use -G, warning that this
# May have a significant impact on GPU device code, since optimizations are turned off
ifeq ($(gpudbg),1)
NVCCFLAGS += -G
dbg = $(gpudbg)
endif
# Debug/release configuration
ifeq ($(dbg),1)
COMMONFLAGS += -g
NVCCFLAGS += -D_DEBUG
CXXFLAGS += -D_DEBUG
CFLAGS += -D_DEBUG
BINSUBDIR := debug
LIBSUFFIX := D
else
COMMONFLAGS += -O2
BINSUBDIR := release
LIBSUFFIX :=
NVCCFLAGS += --compiler-options -fno-strict-aliasing
CXXFLAGS += -fno-strict-aliasing
CFLAGS += -fno-strict-aliasing
endif
# architecture flag for cubin build
CUBIN_ARCH_FLAG :=
# OpenGL is used or not (if it is used, then it is necessary to include GLEW)
ifeq ($(USEGLLIB),1)
ifneq ($(DARWIN),)
OPENGLLIB := -L/System/Library/Frameworks/OpenGL.framework/Libraries
OPENGLLIB += -lGL -lGLU $(COMMONDIR)/lib/$(OSLOWER)/libGLEW.a
else
# this case for linux platforms
OPENGLLIB := -lGL -lGLU -lX11 -lXi -lXmu
# check if x86_64 flag has been set, otherwise, check HP_64 is i386/x86_64
ifeq ($(x86_64),1)
OPENGLLIB += -lGLEW_x86_64 -L/usr/X11R6/lib64
else
ifeq ($(i386),)
ifeq "$(strip $(HP_64))" ""
OPENGLLIB += -lGLEW -L/usr/X11R6/lib
else
OPENGLLIB += -lGLEW_x86_64 -L/usr/X11R6/lib64
endif
endif
endif
# check if i386 flag has been set, otehrwise check HP_64 is i386/x86_64
ifeq ($(i386),1)
OPENGLLIB += -lGLEW -L/usr/X11R6/lib
else
ifeq ($(x86_64),)
ifeq "$(strip $(HP_64))" ""
OPENGLLIB += -lGLEW -L/usr/X11R6/lib
else
OPENGLLIB += -lGLEW_x86_64 -L/usr/X11R6/lib64
endif
endif
endif
endif
endif
ifeq ($(USEGLUT),1)
ifneq ($(DARWIN),)
OPENGLLIB += -framework GLUT
else
ifeq ($(x86_64),1)
OPENGLLIB += -lglut -L/usr/lib64
endif
ifeq ($(i386),1)
OPENGLLIB += -lglut -L/usr/lib
endif
ifeq ($(x86_64),)
ifeq ($(i386),)
OPENGLLIB += -lglut
endif
endif
endif
endif
ifeq ($(USEPARAMGL),1)
PARAMGLLIB := -lparamgl_$(LIB_ARCH)$(LIBSUFFIX)
endif
ifeq ($(USERENDERCHECKGL),1)
RENDERCHECKGLLIB := -lrendercheckgl_$(LIB_ARCH)$(LIBSUFFIX)
endif
ifeq ($(USENVCUVID), 1)
ifneq ($(DARWIN),)
NVCUVIDLIB := -L../../common/lib/darwin -lnvcuvid
endif
endif
# Libs
ifneq ($(DARWIN),)
LIB := -L$(CUDA_INSTALL_PATH)/lib -L$(LIBDIR) -L$(COMMONDIR)/lib/$(OSLOWER) -L$(SHAREDDIR)/lib $(NVCUVIDLIB)
else
ifeq "$(strip $(HP_64))" ""
ifeq ($(x86_64),1)
LIB := -L$(CUDA_INSTALL_PATH)/lib64 -L$(LIBDIR) -L$(COMMONDIR)/lib/$(OSLOWER) -L$(SHAREDDIR)/lib
else
LIB := -L$(CUDA_INSTALL_PATH)/lib -L$(LIBDIR) -L$(COMMONDIR)/lib/$(OSLOWER) -L$(SHAREDDIR)/lib
endif
else
ifeq ($(i386),1)
LIB := -L$(CUDA_INSTALL_PATH)/lib -L$(LIBDIR) -L$(COMMONDIR)/lib/$(OSLOWER) -L$(SHAREDDIR)/lib
else
LIB := -L$(CUDA_INSTALL_PATH)/lib64 -L$(LIBDIR) -L$(COMMONDIR)/lib/$(OSLOWER) -L$(SHAREDDIR)/lib
endif
endif
endif
# If dynamically linking to CUDA and CUDART, we exclude the libraries from the LIB
ifeq ($(USECUDADYNLIB),1)
LIB += ${OPENGLLIB} $(PARAMGLLIB) $(RENDERCHECKGLLIB) ${LIB} -ldl -rdynamic
else
# static linking, we will statically link against CUDA and CUDART
ifeq ($(USEDRVAPI),1)
LIB += -L/usr/lib -lcuda ${OPENGLLIB} $(PARAMGLLIB) $(RENDERCHECKGLLIB) ${LIB}
else
ifeq ($(emu),1)
LIB += -lcudartemu
else
LIB += -lcudart
endif
LIB += ${OPENGLLIB} $(PARAMGLLIB) $(RENDERCHECKGLLIB) ${LIB}
endif
endif
ifeq ($(USECUFFT),1)
ifeq ($(emu),1)
LIB += -lcufftemu
else
LIB += -lcufft
endif
endif
ifeq ($(USECUBLAS),1)
ifeq ($(emu),1)
LIB += -lcublasemu
else
LIB += -lcublas
endif
endif
ifeq ($(USECURAND),1)
LIB += -lcurand
endif
ifeq ($(USECUSPARSE),1)
LIB += -lcusparse
endif
# Lib/exe configuration
# Lib/exe configuration
# Lib/exe configuration
ifneq ($(STATIC_LIB),)
TARGETDIR := $(LIBDIR)
TARGET := $(subst .a,_$(LIB_ARCH)$(LIBSUFFIX).a,$(LIBDIR)/$(STATIC_LIB))
LINKLINE = ar rucv $(TARGET) $(OBJS)
else
ifneq ($(OMIT_CUTIL_LIB),1)
LIB += -lcutil_$(LIB_ARCH)$(LIBSUFFIX)
endif
ifneq ($(OMIT_SHRUTIL_LIB),1)
LIB += -lshrutil_$(LIB_ARCH)$(LIBSUFFIX)
endif
# Device emulation configuration
ifeq ($(emu), 1)
NVCCFLAGS += -deviceemu
CUDACCFLAGS +=
BINSUBDIR := emu$(BINSUBDIR)
# consistency, makes developing easier
CXXFLAGS += -D__DEVICE_EMULATION__
CFLAGS += -D__DEVICE_EMULATION__
endif
TARGETDIR := $(BINDIR)/$(BINSUBDIR)
TARGET := $(TARGETDIR)/$(EXECUTABLE)
LINKLINE = $(LINK) -o $(TARGET) $(OBJS) $(LIB)
endif
# check if verbose
ifeq ($(verbose), 1)
VERBOSE :=
else
VERBOSE := @
endif
# Check for input flags and set compiler flags appropriately
ifeq ($(fastmath), 1)
NVCCFLAGS += -use_fast_math
endif
ifeq ($(keep), 1)
NVCCFLAGS += -keep
NVCC_KEEP_CLEAN := *.i* *.cubin *.cu.c *.cudafe* *.fatbin.c *.ptx
endif
ifdef maxregisters
NVCCFLAGS += -maxrregcount $(maxregisters)
endif
ifeq ($(ptxas), 1)
NVCCFLAGS += --ptxas-options=-v
endif
# Add cudacc flags
NVCCFLAGS += $(CUDACCFLAGS)
# Add common flags
NVCCFLAGS += $(COMMONFLAGS)
CXXFLAGS += $(COMMONFLAGS)
CFLAGS += $(COMMONFLAGS)
ifeq ($(nvcc_warn_verbose),1)
NVCCFLAGS += $(addprefix --compiler-options ,$(CXXWARN_FLAGS))
NVCCFLAGS += --compiler-options -fno-strict-aliasing
endif
# Set up object files
OBJDIR := $(ROOTOBJDIR)/$(LIB_ARCH)/$(BINSUBDIR)
OBJS += $(patsubst %.cpp,$(OBJDIR)/%.cpp.o,$(notdir $(CCFILES)))
OBJS += $(patsubst %.c,$(OBJDIR)/%.c.o,$(notdir $(CFILES)))
OBJS += $(patsubst %.cu,$(OBJDIR)/%.cu.o,$(notdir $(CUFILES)))
# Set up cubin output files
CUBINDIR := $(SRCDIR)data
CUBINS += $(patsubst %.cu,$(CUBINDIR)/%.cubin,$(notdir $(CUBINFILES)))
# Set up PTX output files
PTXDIR := $(SRCDIR)data
PTXBINS += $(patsubst %.cu,$(PTXDIR)/%.ptx,$(notdir $(PTXFILES)))
# Rules
$(OBJDIR)/%.c.o : $(SRCDIR)%.c $(C_DEPS)
$(VERBOSE)$(CC) $(CFLAGS) -o $@ -c $<
$(OBJDIR)/%.cpp.o : $(SRCDIR)%.cpp $(C_DEPS)
$(VERBOSE)$(CXX) $(CXXFLAGS) -o $@ -c $<
# Default arch includes gencode for sm_10, sm_20, sm_30, and other archs from GENCODE_ARCH declared in the makefile
$(OBJDIR)/%.cu.o : $(SRCDIR)%.cu $(CU_DEPS)
$(VERBOSE)$(NVCC) $(GENCODE_SM10) $(GENCODE_ARCH) $(GENCODE_SM20) $(GENCODE_SM30) $(NVCCFLAGS) $(SMVERSIONFLAGS) -o $@ -c $<
# Default arch includes gencode for sm_10, sm_20, sm_30, and other archs from GENCODE_ARCH declared in the makefile
$(CUBINDIR)/%.cubin : $(SRCDIR)%.cu cubindirectory
$(VERBOSE)$(NVCC) $(GENCODE_SM10) $(GENCODE_ARCH) $(GENCODE_SM20) $(GENCODE_SM30) $(CUBIN_ARCH_FLAG) $(NVCCFLAGS) $(SMVERSIONFLAGS) -o $@ -cubin $<
$(PTXDIR)/%.ptx : $(SRCDIR)%.cu ptxdirectory
$(VERBOSE)$(NVCC) $(CUBIN_ARCH_FLAG) $(NVCCFLAGS) $(SMVERSIONFLAGS) -o $@ -ptx $<
# The following definition is a template that gets instantiated for each SM
# version (sm_10, sm_13, etc.) stored in SMVERSIONS. It does 2 things:
# 1. It adds to OBJS a .cu_sm_XX.o for each .cu file it finds in CUFILES_sm_XX.
# 2. It generates a rule for building .cu_sm_XX.o files from the corresponding
# .cu file.
# The intended use for this is to allow Makefiles that use common.mk to compile
# files to different Compute Capability targets (aka SM arch version). To do
# so, in the Makefile, list files for each SM arch separately, like so:
# This will be used over the default rule abov
# CUFILES_sm_10 := mycudakernel_sm10.cu app.cu
# CUFILES_sm_12 := anothercudakernel_sm12.cu
define SMVERSION_template
#OBJS += $(patsubst %.cu,$(OBJDIR)/%.cu_$(1).o,$(notdir $(CUFILES_$(1))))
OBJS += $(patsubst %.cu,$(OBJDIR)/%.cu_$(1).o,$(notdir $(CUFILES_sm_$(1))))
$(OBJDIR)/%.cu_$(1).o : $(SRCDIR)%.cu $(CU_DEPS)
# $(VERBOSE)$(NVCC) -o $$@ -c $$< $(NVCCFLAGS) $(1)
$(VERBOSE)$(NVCC) -gencode=arch=compute_$(1),code=\"sm_$(1),compute_$(1)\" $(GENCODE_SM20) $(GENCODE_SM30) -o $$@ -c $$< $(NVCCFLAGS)
endef
# This line invokes the above template for each arch version stored in
# SM_VERSIONS. The call funtion invokes the template, and the eval
# function interprets it as make commands.
$(foreach smver,$(SM_VERSIONS),$(eval $(call SMVERSION_template,$(smver))))
$(TARGET): makedirectories $(OBJS) $(CUBINS) $(PTXBINS) Makefile
$(VERBOSE)$(LINKLINE)
cubindirectory:
$(VERBOSE)mkdir -p $(CUBINDIR)
ptxdirectory:
$(VERBOSE)mkdir -p $(PTXDIR)
makedirectories:
$(VERBOSE)mkdir -p $(LIBDIR)
$(VERBOSE)mkdir -p $(OBJDIR)
$(VERBOSE)mkdir -p $(TARGETDIR)
tidy :
$(VERBOSE)find . | egrep "#" | xargs rm -f
$(VERBOSE)find . | egrep "\~" | xargs rm -f
clean : tidy
$(VERBOSE)rm -f *.stub.c *.gpu *.cu.cpp *.i *.ii
$(VERBOSE)rm -f *.cubin *.ptx *.fatbin.c *.hash
$(VERBOSE)rm -f *.cudafe1.c *.cudafe2.c *.cudafe1.cpp *.cudafe2.cpp
$(VERBOSE)rm -f $(OBJS)
$(VERBOSE)rm -f $(CUBINS)
$(VERBOSE)rm -f $(PTXBINS)
$(VERBOSE)rm -f $(TARGET)
$(VERBOSE)rm -f $(NVCC_KEEP_CLEAN)
$(VERBOSE)rm -f $(ROOTBINDIR)/$(OSLOWER)/$(BINSUBDIR)/*.ppm
$(VERBOSE)rm -f $(ROOTBINDIR)/$(OSLOWER)/$(BINSUBDIR)/*.pgm
$(VERBOSE)rm -f $(ROOTBINDIR)/$(OSLOWER)/$(BINSUBDIR)/*.bin
$(VERBOSE)rm -f $(ROOTBINDIR)/$(OSLOWER)/$(BINSUBDIR)/*.bmp
$(VERBOSE)rm -f $(ROOTBINDIR)/$(OSLOWER)/$(BINSUBDIR)/*.txt
$(VERBOSE)rm -f $(CUBINDIR)/*.cubin $(PTXDIR)/*.ptx
$(VERBOSE)rm -rf $(ROOTOBJDIR)
$(VERBOSE)rm -rf $(LIBDIR)
$(VERBOSE)rm -rf $(OBJDIR)
$(VERBOSE)rm -rf $(TARGETDIR)
clobber : clean
$(VERBOSE)rm -rf $(COMMONDIR)/lib/*.a
$(VERBOSE)rm -rf $(SHAREDDIR)/lib/*.a
$(VERBOSE)rm -rf $(COMMONDIR)/obj
$(VERBOSE)rm -rf $(SHAREDDIR)/obj
The output of echo $LD_LIBRARY_PATH is blank.
I have checked for libcuda and can find it:
# ls /usr/lib | grep libcuda
libcuda.so.1
libcuda.so.304.32
Is there something obvious I need to do to get these to compile?
Thanks again.

Screen black after sleep startup and won't turn off w/ power button?

I have a Powerbook G4 and hardly ever turn it off, till lately.
My computer started turning itself off after I would open it and wake it up from sleep mode. It would flash the screen quickly and then go black. All efforts to turn it off with the power button failed. I had to remove the battery and disconnect the power cord for about 2 minutes until it eventually shut down. I have not had this issue since I have been turning it off after every use, but was wondering if this was a sign that something was going out on my computer?
Thanks!

Try a system reset. It cures many ills and it's quick, easy and harmless...
Hold down the on/off switch and the Home button simultaneously until the screen blacks out or you see the Apple logo. Ignore the "Slide to power off" text if it appears. You will not lose any apps, data, music, movies, settings, etc.
If the Reset doesn't work, try a Restore. Note that it's nowhere near as quick as a Reset. From iTunes, select the iPad/iPod and then select the Summary tab. Follow directions for Restore and be sure to say "yes" to the backup. You will be warned that all data (apps, music, movies, etc.) will be erased but, as the Restore finishes, you will be asked if you wish the contents of the backup to be copied to the iPad/iPod.
There's more to try but let's go a bit at a time.

Hp pavilion monitor go's black after boot screen

when i start my pc the boot screen will appear on the monitor but after that it go's black. i can hit one of the f keys to take me to the boot page or diagnostics page but when i change the boot path and hit save then enter it just go's back to the black screen i have also hit the f9 key to go to the diagnostics page and ran the on board hp diagnostics tool which says everything has passed when i try to go back the screen go's black again! at first i thought it was a graphics card issue so i replaced the old one with a new one same thing, i also tried plugging into the three different slots on the graphics card i started with the dvi slot with an adapter on my cable it will not even show the boot page it just go's strait to no signal so i switched to the VGA slot that's were i can get to the boot screen, last i tried the hdmi port and again i can get to the boot screen but then it go's black i removed the ram and cleaned it, and was going to try and go strait from the mother board to the monitor but i got scared when i saw the black cap with the words DO NOT REMOVE on it! i have tried 2 different monitors just to eliminate that probability but now I'm just lost any ideas would be appreciated!
This question was solved.
View Solution.

I think your right i'm thinking the hard drive to, thanks for your reply!

My HP Touchsmart IQ507 screen turns black after boot up

Shortly after I boot up and pass the windows logo creen my monitor turns black but doesn't shut down, however I cannot access the screen.

Hello
I see that you are having problems with the screen going blank right after start up, is that correct?
While looking for information on your computer I found this link. It is troubleshooting steps for blank screen issues for your model computer. Try these steps and they may help with the problem.
Let me know what happens or if you have questions.
↙-----------How do I give Kudos?| How do I mark a post as Solved? ----------------↓

T400 LCD screen black after replecement

History - T400 (2767-31U), Win 7.
LCD screen broken due to a drop. Laptop still worked with an external monitor via VGA slot and I ordered a replacement LCD.
The replacement finally (used-off ebay) arrived and I followed the HMM manual and replaced the LCD. But it still does not work. I can continue to use the ext monitor without any issues. The replacement LCD was the full assembly not just the LCD screen.
Here is what I noticed:
1. When booting up, I see the Thinkpad logo very very faintly before it goes fully black again.
2. All the LCD panel lights work fine - Wireless, BT, HDD, Battery, Power etc etc including the reading light.
3. The laptop recognizes when I open and close the lid and switches on the ext monitor accordingly.
Here is what I did (I followed the HMM to the detail):
4. When I replaced the LCD, I noticed that the original LCD had 2 black wires insulated at the ends originating from the bottom left area of the LCD that were not actually plugged into any area of the MB. I did the same on the replacement LCD and left them as it is. I don't even know what these are.
5. I connected the other 3 wires(white, grey and black) and the main connector as the original LCD/HMM.
6. I uninstalled the display drivers and restarted and Win 7 automatically installed the drivers again.
7. The Most important part - The original LCD when powered on, DID have backlight showing me the mangled area of the screen so I know it worked before replacement.
I have read quite a bit of posts regarding T400 black screen issues, pointing me towards a faulty MB, blown fuse or faulty inverter. I know the replacement is an exact replica of the original LCD.
Could it be that I didn't connect the wires correctly to their respective slots on the MB?
Any inputs would be highly appreciated.
Edit:
Solved!
Go to Solution.

Welcome to the forum!
Do I understand correctly that you bought a complete new LCD Assembly? Do you have proof from the seller that it was working properly before you bought it?
Can you see a picture if you use a torchlight over the panel?
A faint dark picture could be a defective LCD cable, inverter/LED card or a defective LCD backlight. Since you see a picture I would rule out a motherboard fuse problem.
Edit: Richk was faster!
/L40SX/240/240X/2*340CSE/360PE/365XD/380D/380E/380XD/380Z/390/560E/560X/2*570/2*600/600E/750Cs/755C/760CD/760EL/760XD/770E/A20p/A22p
A31/i1600/G40/R50p/R61i/S30/SL510/2*T22/4*T4x/11*T6x/6*T4x0x/6*T5x0/3*W5x0/W700/3*X2x/4*X3x/3*X4x/5*X6x/3*X6xT/10*X2xx/2*X200T/4*X30x/Z60m/3*Z61x
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MacBook (2007) screen black after reboot/shutdown

Hi all I hope you can help me.
I have a MacBook C2D 2GHz, 2gigs of ram from mid 2007.
I cant remember when the problem appeared but maybe 6 months ago.
Every time my macbook is rebootet or shutdown after an update or if it runs out of battery the screen remains black. The sleep light stays constant on but the chime is played and cd drive makes it usual short start up sound.
I can hear the harddrive working and after maby 30 sec, the screen comes on but its all whiteish with a black stripe down in the right side and stays like this, other times the screen comes on with the desktop but flashing/bounching
If I hold down the power button to kill it off and hit the powerbutton again the same thing happens.
The way I fix it is to power off, take out the battery for about 10 sec. put it back in and hold the trackpad button down or put two fingers on the trackpadand power on, it starts normal with the grey screen and the littel apple logo and boot normally to the desktop. But today today it took me 7 atempts with the above method before it worked.
Is my screen about to die or is it software related.

I have the same problem and I dont think I had this happen until 2 weeks ago and I've had the latop since the last week of August. I've also had the problem crop up when I had the laptop go to sleep while watching a video online and when I tried to wake the laptop back from sleep, I get the blank screen with the cursor. My system is a Macbook air 11" 2013 1.3 Ghz with 4gb ram and 256 gb SSD. I also have a 15 MBPro and have not encountered this problem. Is this anyway related to the recent update that OSX was pushing for the upcoming Maverick update?

Viewer Screen Black after Mavericks and Apertutre updates

Hello All, I have updated to Mavericks on my home iMac that is a few years old, and a new one at work that is 6 months old. Everything was fine and then I updated to Aperture 3.5. Now on BOTH machines, I am able to see all of my images in browser view fine. In split view the images in the filmstrip at the bottom of the screen are still fine, but the main image being viewed is black. In full viewer the image is completely black. It will indicate loading, show all photo info at the bottom of the viewer, but load as a black image.I can use an external editor PS5 without issue. I have completed the three step for the library first aid. When opening Aperture, the image may flash on the screen for a split second, and then show as black.
Apple support only seemed interested in having me sign up for Apple Care, even though this is a software bug, so this left me a bit unhappy. As a photographer that really needs Aperture running correctly, I'm at a standstill and may need to move to Adobe as an emergency solution.

Weird it is happening on two separate machines. Was the library from one machine copied to the other? What camera and are the originals Raw?
Try making a new empty library and import a few images into it, what happens? If it still fails there try running as a new user or from the Guest account if you have that enabled. Start Aperture and add a few images to a new library, what happens?
Also try looking at one of the original files in Preview, is it OK there?

Screen black after mountain lion install

After install, the screen connected to the original video card is black, other 2 screens connected to evga gtx 285 are ok. do i need a new video card?

I have the same problem over here!
I installed the ML and after that, my BRAND NEW MacBook Pro with Retina Display rebooted.
The only problem is that the display is black! I tried to reboot a few times holding the power button with no success, only to have an idea. I connected an HDMI cable to my TV and I could see the login screen and work nice.
But c'mon, i bought a laptop to take it wherever i want. Now I can only get the image on my TV with the HDMI cable.
Does anyone knows how to put the image back on the screen? I tried everything from rebooting and taking out the HDMI cable to searching on the Settings>Monitors for something..
Thank you in advance for any answer.

Screen Black after waking from sleep mode (after 10.4.11 update)

This issue has happened before with an earlier update (10.3.8 Delta fixed the issue originally), and I suspect it is the same with this current update.
Has anyone else had this problem with the new update and has there been a patch released to fix the problem yet? Hopefully we can get an update soon.

This happens every so often to my 12" Aluminium PowerBook after sleeping (black screen, hard drive spinning away) and after trying every possible key combination and nothing helping, I'm usually left with the usual last resort, which is a hard restart. Of course that remedies the problem short term but unfortunately, only until the next time it happens. For me, it has been an issue since I bought it and is not affected by the OS.
I am wondering if it has anything to do with the clasp not working properly when the lid is closed. Sometimes I get the sleeping light, sometimes not - unless I play with the lid until it clicks shut. Then the light appears. Importantly, when the sleeping light appears, the machine always wakes properly with the lid opening. But I have noticed that when the light does not come on and I haven't bothered to shut it down properly, that is when the problem occurs. Which makes me wonder if rather than going into sleep mode it is actually going into hibernation mode due to non use? I haven't a clue but perhaps someone here knows far more about such things than myself?

Screen black after MacBook Air

I installed MacBook Air & Pro Update 2.0 on my 2012 13" MacAir and I find that sometimes when the Air is idle and the screen blanks (energy saver) it stays black and doesn’t tuen on again when I press a key. The only way to recover is a power cycle.
This happened twice. I turned off the option to turb off the screen when idle only enabling the scree saver and it hasn't happened since.
So there is an issue with the energy saver after applying this update.
Anybody seen this???

Yes, happens to me. And other bad things.
I read somewhere that Apple has pulled the update. Too late for those of us that installed it and are having problems.

Screen darkens after booting in Windows mode

I have an intel mac pro that runs windows xp (sp3) on boot camp.
Every time i boot up in windows mode, once I reach the desktop, the screen darkens. Windows xp, to my knowlege, does not have the capacity to adjust screen brightness, as that is normally done manually with the monitor. When I boot back up in mac mode, the screen is unusually dark, so I go to the display window in the control panel, and find that it has been set to minimum brightness.
This does not happen unless I boot up in windows mode.
I think this is a new phenomenon. Since it's relatively subtle, it may have been going on for a while.
I just installed SP3 a few days ago, after installing the bootcamp 2.1 update.
and before you ask, yes, i have installed the mac drivers in windows.

hmmmm. Interesting. Does seem that the monitor is common. Your description just says macPro. If the 8800 is the OEM card, then yours is a quad 3.0, or current gen 8 core?
Do you also have the external controls on the monitor disabled via the X control panel? Although the old 23 does have both brightness and power controls on the front bezel, I have disabled them in the X control panel. I wonder if re-enabling them and using it for brightness control instead would make a difference on the windows side?
===
On replacing the monitor....
Is the 8800 GT HDCP compliant?
I don't think Apples new FP displays are. I say that b/c if if you do replace the monitor, it may be worth considering a small HD TV, many of which are HDCP compliant, and less expensive than the Apple screen.
That would set you up for an internal blueray player
I've seen a Sony on sale for about 150.
I have an off brand...Insignia, I think, 19" HDTV as the monitor on my Windows box. Surprisingly nice screen, and has an ATSC tuner, too. Think retail on it like 300$ at BBuy (I got it as a giveaway at a local car dealer).
HDMI, composite, and VGA inputs. composite and minijack for audio.

My iPhone turns screen black after a call ....

The only way to have the normal screen again is by locking and unlocking the iPhone...
My iphone as 1 month and a couple of weeks ... I have sent the iphone back to the operator, but it returned the same way...
I have done a soft reset and a total system restore from itunes...
Getting out of resolutions...
What can i do?
Thanks

Thanks for replying ... Its not normal what my iPhone is doing .... Normal is after a call the screen goes back to normal or like you said back to the contact page or keypad ... When it stays black, it remains black ...not even the home button does nothing about it , only by pushing the power button it comes back to normal.
But thanks anyway.

Screen black after opening

Hello,
I was wondering if anyone could help me with a problem that I'm having with my Mac Book Pro. I hardly ever turn off my computer and usually just close so basically the computer is sleeping. When I go to open my computer I have a black screen and the sleep light that blinks is still on. I press and hold the shutdown bottom to turn it off and turn it back on and everything is fine. The problem doesn't happen all the time either. I was wondering anyone had any idea what was going on.

It can also mean that your computer is looking for a far-away network if you are using wireless networking when the problem occurs.
When my MBP (running 10.5 at the time) started that same behavior, I found that I had accumulated a huge list of wireless networks on my travels. Reviewing the system log, I found my computer was trying to connect to one, a hotel network to which I had connected weeks before and miles away.
Here's how I fixed it:
1) Open System Preferences and select "Network."
2) Be sure "Airport" is selected in the left side of that preference pane.
3) Click the "Advanced" button. If the next screen does not have the "Airport" tab selected, select it. There should be a window with a list of networks.
4) Use the + and - buttons below to remove any networks you have accumulated that are not needed. Example: on mine, there are now only two networks--our home network and the one at a museum where I volunteer.
5) Once you'd cleaned off the list to the bare necessities, uncheck the option labeled, "Remember any network this computer has joined." This will not prevent you from using other networks on later travels but will prevent them building up and creating problems.
That completely cured my wake-from-sleep problems. and other have said it worked for them, too.

MBP screen black after using DVI to HDMI cable

Over a week ago I attempted to connect my MBP 2007 model to my samsung television with HDMI in. I have used this cable before but always have trouble getting it to work with this TV and my computer.
Well, I plugged it in and the screen on my computer went black and the image failed to appear on the TV despite tinkering with the settings.
When I unplugged the cable The image would not restore to my screen so I restarted it...same back screen. I took the battery out and pushed the power button to drain the juice and put it back in. No luck. Please help. Any usea? Seems to just be a software problem.
Sent from my iPhone, sigh
Message was edited by: Drew4544

MacBook Pro: Distorted video or no video issues

Screen black after booting (backlight still on)

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