S930 stuck at Lenovo screen while boot up.

My S930 stuck at lenovo screen while boot up.
I tried to leave the phone while waiting for it to boot until the battery drain out.
Then charged till full , try to boot again and it still stuck at the same lenovo screen..
What to do? How to reset / factory default ?
Please help. TQ

Issue :- G500 Lenovo laptop screen gets stuck at lenovo screen and does not allow to do any thing alternatively need to power off laptop.
I am also having this same problem occasionally. In that case if my screen stuck at lenovo screen then I turn off my laptop, After while when I turn it on then problem go off. But today same method did not help me, finally I removed my batter for a while then plugged it again which again resolved the issue.
I purchased my G500 lenovo laptop 4 or 5 months ago , it had been working fine for first 3 months but after it I encountered with this probelm.
I updated my bios with latest available version but that also not helped me
My concern is that why this problem is occuring occasionally. Request you to share valuable steps and guide us to get rid off from this problem.
Thanks and Regards
Ashok Dewan

Similar Messages

My old mac powerbook g4 wont boot up, it wont show apple logo and spinner aswell just stuck on grey screen while booting please help me

i have a old powerbook g4 which i usally use to store some photos and to listen music. the battery of my powerbook is completly dead so i used to use my powerbook using charger adapter so whenever my power cuts down my laptop will be shutdown.
one day i had just bootedup my powerbook and some date notificateion poped up so i press enter and suddenly my power went off and laptop shuted down. and next time when i tried to boot its stuck at grey screen , i even cant reach the apple logo and spinner. please helppp me :!!!!!!!!!!!!!!!

Resetting PRAM and NVRAM is not working
and i cann't boot it on safemode holding shift button and while holding option or c button at startup i can only see three things 1 is refresh button, 2 macintosh HD with X under it, 3 arrow forward button please help me

U430 stucked at Lenovo screen, BIOS won't start either

Hi, I have IdeaPad u430 touch, six monts old. I had some blue screens in the past, I cleaned all possible viruses and diagnosed hard disc with no results. Laptop was running smooth until now.
I shut it down last night and today it restarted itself couple times and then I wasn't able to start it at all. It gets stuck at Lenovo screen, no Windows loading circle/dots.., I can't access BIOS or anything else through the novo button, it just gives me the Lenovo screen again. F2 does not work either.
I also noticed that when I tried to install updates it wouldn't do anything just spinned the Windows buisy icon for a while, if that can be any clue.
I haven't removed the battery yet, as it is under cover which needs to be unscrewed. The computer is still under warranty. I'm not sure if opening the cover wouldn't viod the warranty. I'm not impressed, my boyfriends IdeaPad has been good for six years
Any suggestions on how to boot the computer again or what's wrong with it? I'm totally done today, tomorrow I'm calling support, but I'm not sure how they can be helpful, if the computer won't boot at all...
M.
Solved!
Go to Solution.

Hi Martinka,
Welcome to the Forums
As per the query we understood that you are facing issue with system hangs at post in your U430 laptop.
Does the system overheats, as this might be issue with the motherboard please visit the nearest service center.
Click here to open a link where you can select the country and get the exact contact support number. I’m sure they will be a great help.
Hope this helps. Do post back if the issue persists!
Best regards,
Ashwin. S
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If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
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S820 stuck at lenovo screen

Hi, My S820 lenevo stuck a lenovo screen and won't move on...Tried soft reset like holding 'On' button and volume button but problem still persists...Appreciate someone out there able to guide me (steps by steps) to rectify problem..
I read about software reset like flash tool and MTK...willing to do if you could guide me...
thanks
Louise

Issue :- G500 Lenovo laptop screen gets stuck at lenovo screen and does not allow to do any thing alternatively need to power off laptop.
I am also having this same problem occasionally. In that case if my screen stuck at lenovo screen then I turn off my laptop, After while when I turn it on then problem go off. But today same method did not help me, finally I removed my batter for a while then plugged it again which again resolved the issue.
I purchased my G500 lenovo laptop 4 or 5 months ago , it had been working fine for first 3 months but after it I encountered with this probelm.
I updated my bios with latest available version but that also not helped me
My concern is that why this problem is occuring occasionally. Request you to share valuable steps and guide us to get rid off from this problem.
Thanks and Regards
Ashok Dewan

Stuck in Lenovo screen A1000

I CANNOT OPEN MY LENOVO TABLET A1000 . IT STUCK IN LENOVO SCREEN I CANNOT DO THE SOFT AND HARD RESET. WHAT WILL I DO?

For start, how did you tried to do the soft reset?

G500 stuck on lenovo screen

my G500 is stuck on the lenovo screen. i have read the forums and tried the solution of flee-power and did not work, and then i tried resetting the BIOS and did not work. Then I reset windows and my computer factory settings, and it still did not work.I don't understand what is wrong. It seems as if this is a problem with the G500 that other people have faced as well and your solutions don't seem to work.

htrevor216 wrote:
my G500 is stuck on the lenovo screen. i have read the forums and tried the solution of flee-power and did not work, and then i tried resetting the BIOS and did not work. Then I reset windows and my computer factory settings, and it still did not work.I don't understand what is wrong. It seems as if this is a problem with the G500 that other people have faced as well and your solutions don't seem to work.
Have you attempted to boot from an external source (live DVD or Flash Drive)? If you have access to another computer you can download and create a "Live CD or Live DVD" of Linux to see if the system will boot successfully. If that does not work and you are still unable to move past the Lenovo screen it may be a hardware error or the BIOS has become corrrupted. Either of those options will require Lenovo Service Center to fix.

Startup stuck at Lenovo screen

Hi
I am having startup problem with my Lenovo G500.
I closed the lid after using the laptop with power cable connected. After 3 or 4 hours I just picked up the laptop and put it in the bag for traveling. After 12 hours when I took it out it was too hot.
I tried to switch it on but it stuck on Lenovo startup screen. Then I removed HDD and started again, It showed error of no bootable device. Then I connected HDD and started it worked fine for few days.
Now again same problem of startup screen.
I've done power flee procedure as well but of no use now.
Can anybody please guide me what's the suspected problem in the laptop?
Regards
Nasir
Solved!
Go to Solution.

hi nasirraza2009,
Welcome to the Forums.
When the machine gets stucked on the lenovo logo, can you boot into the BIOS (by pressing F2 or Fn+F2) and check if the HDD is detected
- Link to picture
In addition, If the machine boots again into Windows again, to un a diagnostic on the HDD to verify its health.
- Lenovo Storage Test or
- HD Tune.
- http://www.hdtune.com/faq_1.html
If you're unable to run a diagnostic on the drive then I recommend you contact lenovo and report the problem as there's likely an issue on the HDD / HDD's connection to the motherboard (or other internal component).
Support phone list
Regards
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
Follow @LenovoForums on Twitter!

Gray screen while booting

Hi Im Having trouble with my mac pro while booting
When i shutdown my mac en restart it the next day it takes several minutes for the mac to show the apple logo.
when i disconnect the powercable it starts up directley. i tryed a nvram/pram reset, safe boot, verbose boot and
a smc reset but no luck. the only this i see with verbose boot is a black screen with one cursor stripe. and than
after a few minutes the mac starts up. how can i resolve this problem ???????

Reinstall Lion, Mountain Lion, or Mavericks without erasing drive
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu. Select Restart from the Apple menu.
Reinstall Mountain Lion or Mavericks
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

K1 stuck on "Lenovo" screen.

Happy IBM and Lenovo user here but having an issue with my parents new K1. I got them set up last night with their new tablet which they loved! Issue is its stuck on the black backround with the "Lenovo" screen. I asked what they might have done but they obviously don't have any idea what they did. Tried holding down the power button from 1-10 seconds as well as holding down the power and volume buttons at the same time with no change. Is pull the battery but the back cover doesn't look like it wants to be taken off.
Thanks,
Grant

@GrantB,
Try holding the power button for more than 10 secs and see if it helps. It happened to mine before but I was able to force it to shut off then turn it back on then it worked again.
If problem persist, send it to service.
//JameZ
Check out the Community Knowledge Base for hints and tips.
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"!
X240 | 8GB RAM | 512GB Samsung SSD

Mac stuck on white screen after booting.

My Mac boots and after the spinning wheel at apple logo vanishes it gets stuck on white screen..
I was running the following commands in terminal when my mac froze and I had to restart it.. After that it is on the white screen..
The commands I ran :
cd Applications
cd XAMPP/xamppfiles/htdocs/experiment
ls -l
sudo chmod 0644 /
And after that my Mac froze and I had to force restart by holding the power button.. After restart its stuck on white screen just before the login screen.

I am able to boot in Recovery HD.. did the repair permissions but that sudo command had affected the entire drive.. Reinstalling was the only option left..
Although I had to do
sudo chmod 0644 /Applications/XAMPP/xamppfiles/htdocs
but ended up pressing the return key just after the first "/"
Thanks for your help.

OS X Stuck at grey screen, while bootcamp starts up normally

Hello,
When I try to start up on my OS X it doesn't work. The screen is stuck at the grey screen with the spinning wheel. While I try to start up bootcamp (Windows 8) everything works and I can do everything.
I tried everything (Safe boot, reset NVRAM / PRAM), doesn't work.
Does anyone has a suggestion of what I can do?
My conclusion: there can't be any hardware failure because bootcamp is performing normally.
By the way, yesterday I was still able to get into my OS X and work normally. I have no idea what could've happened.

Alright, I think I have to replace some files to my external disk. Which isn't a problem.
Etrecheck report:
Hardware Information:
          MacBook Pro (Retina, Mid 2012)
          MacBook Pro - model: MacBookPro10,1
          1 2.3 GHz Intel Core i7 CPU: 4 cores
          8 GB RAM
Video Information:
          Intel HD Graphics 4000 - VRAM: 1024 MB
          NVIDIA GeForce GT 650M - VRAM: 1024 MB
System Software:
          OS X 10.9.1 (13B42) - Uptime: 0 days 0:52:16
Disk Information:
          APPLE SSD SM256E disk0 : (251 GB)
                    EFI (disk0s1) <not mounted>: 209,7 MB
                    Macintosh HD (disk0s2) /: 195,14 GB (23,04 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
                    Windows 8 (disk0s4) /Volumes/Windows 8: 55 GB (3,52 GB free)
USB Information:
          Western Digital Elements 1042 1 TB
                    EFI (disk1s1) <not mounted>: 209,7 MB
                    Angelo (disk1s2) /Volumes/Angelo: 999,86 GB (682,83 GB free)
          Western Digital Ext HDD 1021 1 TB
                    MANON (disk2s1) /Volumes/MANON: 1 TB (861,67 GB free)
          Apple Inc. FaceTime HD Camera (Built-in)
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Inc. BRCM20702 Hub
                    Apple Inc. Bluetooth USB Host Controller
FireWire Information:
Thunderbolt Information:
          Apple Inc. thunderbolt_bus
                    Apple Inc. Thunderbolt to Gigabit Ethernet Adapter
Kernel Extensions:
          com.orderedbytes.driver.CMUSBDevices          (4.6.0 - SDK 10.6)
          com.cyberic.SmoothMouse          (7 - SDK 10.8)
          com.orderedbytes.driver.ControllerMateFamily          (4.6.0 - SDK 10.6)
          com.Cycling74.driver.Soundflower          (1.6.6 - SDK 10.6)
          com.waves.driver.soundgrid          (2.0.0)
          com.bresink.driver.BRESINKx86Monitoring          (9.0)
Startup Items:
          MySql_init: Path: /Library/StartupItems/MySql_init
Problem System Launch Daemons:
Problem System Launch Agents:
Launch Daemons:
          [loaded] com.adobe.fpsaud.plist 3rd-Party support link
          [loaded] com.adobe.SwitchBoard.plist 3rd-Party support link
          [loaded] com.github.GitHub.GHInstallCLI.plist 3rd-Party support link
          [loaded] com.google.keystone.daemon.plist 3rd-Party support link
          [loaded] com.microsoft.office.licensing.helper.plist 3rd-Party support link
          [loaded] com.waves.daemon.SoundGridProtocolService.plist 3rd-Party support link
          [loaded] org.macosforge.xquartz.privileged_startx.plist 3rd-Party support link
Launch Agents:
          [not loaded] com.adobe.AAM.Updater-1.0.plist 3rd-Party support link
          [loaded] com.google.keystone.agent.plist 3rd-Party support link
          [loaded] com.MadCatz.MadCatzSmartTechnology.plist 3rd-Party support link
          [loaded] com.orderedbytes.ControllerMateHelper.plist 3rd-Party support link
          [loaded] net.culater.SIMBL.Agent.plist 3rd-Party support link
          [loaded] org.macosforge.xquartz.startx.plist 3rd-Party support link
User Launch Agents:
          [failed] com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist 3rd-Party support link
          [loaded] com.cyberic.smoothmouse.plist 3rd-Party support link
          [loaded] com.cyberic.smoothmouseupdater.plist 3rd-Party support link
          [not loaded] com.linotype.FontFolderProtector.plist 3rd-Party support link
          [loaded] com.spotify.webhelper.plist 3rd-Party support link
          [loaded] com.valvesoftware.steamclean.plist 3rd-Party support link
User Login Items:
          iTunesHelper
          Dropbox
          Spotify
Internet Plug-ins:
          o1dbrowserplugin: Version: 5.1.2.17113 3rd-Party support link
          Default Browser: Version: 537 - SDK 10.9
          AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 - SDK 10.7 3rd-Party support link
          AdobeAAMDetect: Version: AdobeAAMDetect 1.0.0.0 - SDK 10.6 3rd-Party support link
          FlashPlayer-10.6: Version: 11.9.900.170 - SDK 10.6 3rd-Party support link
          Silverlight: Version: 5.1.20913.0 - SDK 10.6 3rd-Party support link
          Flash Player: Version: 11.9.900.170 - SDK 10.6 Outdated! Update
          QuickTime Plugin: Version: 7.7.3
          googletalkbrowserplugin: Version: 5.1.2.17113 3rd-Party support link
          SharePointBrowserPlugin: Version: 14.0.0 3rd-Party support link
          npgtpo3dautoplugin: Version: 0.1.44.29 - SDK 10.5 3rd-Party support link
          JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Outdated! Update
Audio Plug-ins:
          BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
          AirPlay: Version: 1.9 - SDK 10.9
          AppleAVBAudio: Version: 2.0.0 - SDK 10.9
          iSightAudio: Version: 7.7.3 - SDK 10.9
3rd Party Preference Panes:
          Flash Player 3rd-Party support link
          Mouse Acceleration 3rd-Party support link
          RAT 3rd-Party support link
          SmoothMouse 3rd-Party support link
Bad Fonts:
          None
Old Applications:
          dynamiclinkmediaserver:          Version: 6.0.1 - SDK 10.5 3rd-Party support link
                    /Library/Application Support/Adobe/Common/dynamiclinkmediaserver/1.0/dynamiclinkmediaserver.app
          FontExplorerXAutoload:          Version: 4.0 - SDK 10.4 3rd-Party support link
                    /Users/[redacted]/Library/Application Support/Linotype/FontExplorer X/FontExplorerXAutoload.app
          SLLauncher:          Version: 1.0 - SDK 10.5 3rd-Party support link
                    /Library/Application Support/Microsoft/Silverlight/OutOfBrowser/SLLauncher.app
          /Applications/Melodyne singletrack
                    Melodyne singletrack Uninstaller:          Version: 2.0.1 - SDK 10.5 3rd-Party support link
                    Melodyne singletrack:          Version: 2.0.1 - SDK 10.5 3rd-Party support link
          Melodyne singletrack Licenser:          Version: 2.0.1 - SDK 10.5 3rd-Party support link
                    /Library/Application Support/Celemony/Licenser/Melodyne singletrack Licenser.app
          dynamiclinkmanager:          Version: 6.0.0 - SDK 10.5 3rd-Party support link
                    /Library/Application Support/Adobe/Common/dynamiclink/CS6/dynamiclinkmanager.app
          /Applications/Arturia
                    ARP2600 V2:          Version: 2.5.3 - SDK 10.5 3rd-Party support link
                    CS-80V2:          Version: 2.5.3 - SDK 10.5 3rd-Party support link
          Install Spotify:          Version: 1.0 - SDK 10.5 3rd-Party support link
                    /Users/Manon/Downloads/Install Spotify.app
          Spotify:          Version: 0.8.5.1333.g822e0de8 - SDK 10.5 3rd-Party support link
                    /Users/Manon/Applications/Spotify.app
          VLC:          Version: 2.0.2 - SDK 10.5 3rd-Party support link
          Authorizer:          Version: 1.0.5 - SDK 10.4 3rd-Party support link
          Sequel Pro:          Version: 1.0.2 - SDK 10.5 3rd-Party support link
          TransType 3 Pro:          Version: 3.1.1 - SDK 10.5 3rd-Party support link
          Transmit:          Version: 4.1.9 - SDK 10.5 3rd-Party support link
          FontExplorer X Pro:          Version: 3.5 - SDK 10.4 3rd-Party support link
          Authorization Manager:          Version: 1.0 - SDK 10.4 3rd-Party support link
Time Machine:
          Mobile backups: OFF
          Auto backup: NO - Auto backup turned off
          Time Machine not configured!
Top Processes by CPU:
               5%          WindowServer
               3%          Finder
               2%          MadCatzSmartTechnology
               2%          SGProtocolService
               1%          EtreCheck
Top Processes by Memory:
          328 MB          WindowServer
          328 MB          Dock
          311 MB          Pages
          229 MB          Finder
          205 MB          Mail
Virtual Memory Information:
          1.98 GB          Free RAM
          4.40 GB          Active RAM
          590 MB          Inactive RAM
          1.04 GB          Wired RAM
          850 MB          Page-ins
          0 B          Page-outs

IMac stuck at gray screen when booting

Hi - My 2011 iMac with 10.8.2 is stuck on the gray screen when rebooting. I was in Windows 7 bootcamp, and restarted to OS X. I see the screen below, and once the progress bar reaches 100%, the computer shuts off. Every time I reboot, the same problem. I've disconnected everything, except for the standard bluetooth wireless keyboard. I've tried some various boot options, such as holding down Shift while rebooting, as well as command+R, but neither had any impact, it is the same problem over and over. Any tips on what to try next?

If you want to preserve the data on the internal drive(s), you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data, you can skip this step.
There are several ways to back up a Mac that is unable to fully boot. You need an external hard drive to hold the backup data.
1. Boot into Recovery (command-R at startup) or from a local Time Machine backup volume (option key at startup.) Launch Disk Utility and follow the instructions in the support article linked below, under “Instructions for backing up to an external hard disk via Disk Utility.”
How to back up and restore your files
2. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode by holding down the key combination command-T at the startup chime. Connect the two Macs with a FireWire or Thunderbolt cable. The internal drive of the machine running in target mode will mount as an external drive on the other machine. Copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
How to use and troubleshoot FireWire target disk mode
3. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.

Old mac g5 power pc stuck on blue screen on boot up wht should I do?

I have G5 mac power pc thats stuck on the blue screen when I boot it. can somebody help me. I had a power outage and was resetting the clock when it froze............
iphonehaji

Some things to try.
A PMU reset.
Resetting Cuda/PMU on Power Mac G5, Power Mac G4, Power Macintosh G3
http://docs.info.apple.com/article.html?artnum=86760
How to reset the SMU on a Power Mac G5 (Late 2004) or Power Mac G5 (Late 2005)
http://docs.info.apple.com/article.html?artnum=3003417 Reassemble the computer and test the unit.
If the power was off for a while, your internal PRAM battery may be weak or discharged. Suggest you replace the battery. Check this site for battery part numbers and sources. https://sites.google.com/site/macpram/mac-pram-nvram-cuda-pmu-battery-tutorial Mac PRAM, NVRAM, CUDA/PMU & Battery Tutorial
 Cheers, Tom

G580 (2189) Stuck on Splash Screen during Boot process

Recently my G580 (2189) hangs on Boot. Get the spash screen and pressing F2 or F12 does nothing. Have to keep power cycling the laptop up to 10 times before the boot process succeeds and loads windows.
Running Win7 Professional on G580 (2189) laptop.
Problem only recently started in the past couple of months after a series of Windows updates were installed.
Disk Check reports no errors.
I have read this is a BIOS issue. I have tried changing BIOS to EFI instead of UEFI, but the intermittent problem persists. No updates to my BIOS are available through Lenovo, and I have found no insight when searching the forums. I have found numerous people with the exact same problem, but what I read is that a new motherboard is called for from the people who have contacted Tech Support. I have tried the battery removal, power button 30 seconds, etc. but it does nothing to fix the problem.
Everything worked perfectly up until about 2 months ago. Never an issue. Now my laptop stall on boot, and one stop doesn't even work when the spash screen is stuck and windows does not load.
Anyone know of the "cause" of the problem? Is it truely a BIOS issue?
Any suggestions as to a solution. Laptop only recently went out of warranty, and I find it bizzare that it won't even boot. if it is a BIOS issue, I am guessing reinstalling Win7 Pro won't help.

Follow the below mentioned steps to resolve the issue:
Check if there are any external devices connected to the computer, if yes remove them and restart the system to check if the issue occurs.
Perform Startup Repair:
http://windows.microsoft.com/en-us/windows7/products/features/startup-repair
If the issue persists, then start the system in safe mode with networking and check if the Windows load successfully.
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/boot_failsafe.mspx?mf...
If it works fine in safe mode try performing a clean boot to find the root cause.
To help troubleshoot error messages and other issues, you can start Windows 7 by using a minimal set of drivers and startup programs. This kind of startup is known as a "clean boot." A clean boot helps eliminate software conflicts.
How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7
http://support.microsoft.com/kb/929135
Note: After troubleshooting, make sure to start the computer as mentioned in Step 4 from the above provided KB article.
GuruAid.com

Macbook pro screen stuck on grey screen while system working

Hi everyone. I would like to share with you a very annoying problem I am experiencing with my macbook pro since yesterday.
It's a 15" Intel Core 2 Duo 2.4 ghz (late 2007).
I should start by saying that my macbook was already having, since months, a problem at the display which was kind of flickering at any movement. The Apple Center told me I should have replaced the entire display because the problem is due to a cable which is located inside the display itself and Apple does not provide this kind of repairs. Anyway I decided not to replace the display (which is a very costly operation) since I was very often using an external monitor without any problem.
Yesterday while I was working (without external monitor), the display suddenly freezed with a kind of blinking light. I forced the shut down by holding the START/STOP button for some seconds. Since then I tried to start again many times: I hear the standard startup chime, the computer normally loads for a couple of minutes until the screen get freezed on the grey screen with apple logo, I suppose right in the moment the desktop should appear.
The strange thing is that I discovered, after several attempts, that while the screen is freezed, the computer is normally working! It is regularly connected to the internet through my router and, even if I cannot see anything but the grey screen, when I press the STOP button and then the "ENTER" key it normally goes off.
I tried to connect it to an external monitor as I usually do, but this time it did not work at all. I also checked the hard disk by starting in target mode and found no problem in it. The hard disk and the system on it are OK.
I found on the web that late 2007 macbooks have a well known problem with geoforce video card and that apple is even providing free of charge repairement.
So I thought it might be my case, brought the macbook to the Apple Authorized Service Provider and asked about it. The people there told me that the Apple policy on the replacement is very strict and that classic symptom of geoforce failure is a black screen and not the grey screen with apple logo. They said they will check, but gave me very little hope. They told me that a logic board replacement is worth at least 600 euros which I think is too much for a 2007 computer.
Did anyone have this kind of problem? Do you find more likely to be a problem due to the video card or something different?
Thank you for any help.
Antonio

Holding the shutdown buttom down for several seconds solved the problem. When I booted my mac again, it continued with the update. However, do you guys think my mac have taken damage of this?

S930 stuck at Lenovo screen while boot up.

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