Satallite Pro 440cdx does not power up - black screen

I have a Satellite Pro 440cdx.
Laptop has been sitting for while under bit unknown condition.
When bought it I just got power supply for it. Charging battery light is on.
Computer powers up, I can hear HDD running but then there it no picture on screen.
What can I do or what would the problem could be?

Try to remove the battery from the notebook and disconnect the AC adaptor for a while.
Wait about 20-30min and connect both parts again.
Then try to power up the notebook and check if the screen will appears.
In most similar cases this procedure helped so maybe it helps you too.
Good luck

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MacBook Pro A1260 - does not power on

The MacBook Pro does not power on.
When I press the power button shortly, the sleep indicator light goes on and goes off again (with the macbook going off) within less than a second.
When I press and hold the power button, the sleep indicator light goes on, stays on for about 4 seconds, then begins flashing quickly (4..5 times per second?) for a second or two and then goes off (together with the macbook going off).
What does the blinking mean?
I tried with the battery only.
I tried with power chord only (battery removed).
I tried with battery and power chord connected.
Each time the same result.
The macbook used to have an original power supply, but that broke down. Now I use a nonane replacement, which worked well for some months.
What can I do to fix it?
EDITT:
The screen remains black all the time - the macbook does not beep. I can hear the DVD drive start up - also I believe that I can hear the CPU fan.

sanjampet wrote:
You can try a SMC reset:Intel-based Macs: Resetting the System Management Controller (SMC)
Follow directions for the battery that applies to your machine (one you can remove yourself, or one you should not remove yourself)
3rd party power supplies have been know to cause issues.
I have a machine where I can remove the battery. I followed the SMC reset steps - no change.

Satellite L850D does not boot up - black screen

ok.. my wifes L850D was having problems with black screening on boot up after the toshiba screen.
I ran a few different utilities including a reset.... this all started about 3 weeks after the win 8.1 upgrade.
Rang tech support who nicely informed me that because we put 8.1 on it it voided the warrenty. (nice guys btw)
So refused to help.
So went and reloaded Win 8 from my DeII, just to see if it was a problem with hardware of software.
(yes i know but it was to be only temp).
It booted fine, sat there for ages without a problem.
It wasnt until i downloaded the toshiba drivers, (yes the right ones) did a reboot and hey presto; black screen again.
That would kinda imply its a problem with the toshiba drivers?
Ok so the wife decided screw it, put Win 7 on it.
Rebooted with the disk in. sat and sat. google finally informed me i had to disable secureboot, and put uefi to csm.
Ok fine, went into the bios, disabled secure boot, changed uefi to csm and reboot.
Now i get nothing; screen wont come on at all, fan starts, cd rom kicks over and nothing, shuts down instantly if i push the power button.
I've pulled the battery out, external and internal, let it sit for a half hour and still the same thing.
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The whole story is for me a bit confused so let me start from the beginning with some basic stuff.
In your posting you didnt write which model do you have exactly (L850D-xxx) and I cannot check notebook specification but I presume this notebook was delivered with preinstalled OS, probably Win8.
Notebook with factory settings has preinstalled OS that includes all necessary drivers, tools and utilities. One of them is Toshiba recovery media creator. Using this tool you can create recovery media (DVD or USB) and use it to reinstall original OS if there s some problem and HDD recovery doesn't work.
Best option now would be to use such media and install original recovery image. Have you created this recovery media?
Generally speaking when you by new notebook you are not obliged to use original OS. You can install whatever you want and it has nothing with warranty. You can install any OS, especially all supported operating systems. So I don't understand how you could get such info from technical support.
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This may be a hardware failure, but there are a few things you can try.
First, disconnect all wired peripherals and try to boot in safe mode (shift key held down at startup.)
If that doesn't work, boot from your recovery partition (command-R at startup.) If you can do that, reinstall the Mac OS and try again.
If that doesn't work, reset the NVRAM and PRAM:
Resetting your Mac's PRAM and NVRAM
If none of that works, take the unit to an Apple Store for service.

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I really hope someone can help.
After 15 months my Toshiba A200 seems to have given up the ghost.
I tried to switch it on today and although the blue stand-by LED came on and the orange light on the disk drive there were no other signs of life.
I tried and tried but it just would not boot and the screen did nothing but remain blank.
I tried taking the battery out for more than 30mins, pressing F4 - but nothing.
I have no memory cards inserted or additional hardware such as a webcam. Everything has worked fine before now.
I am not very technical so of you do know how to help then please explain as simply as possible.
I really appreciate any help you may be able to offer!

Hello Sarah
You cannot expect that someone here on this forum can offer exact diagnostic and say for sure what the problem can be. We can here just speculate what the problem can be.
If you want to know for sure what the problem is contact nearest service and let them check your notebook.
It can be mainboard failure, maybe just defective CPU or defective board electronic. Who knows?
So, contact service and ask for help. Inform you about repair costs and at the end you can make decision what to do. If the repair is too expensive for you, you can sell defective notebook on eBay and later buy a new one. I have done this last year with my old Tecra.

Sat Pro 6000 does not power up.

Hi,
I have a couple of problems with SP6000's, that when it comes to powering them on, they either will not start or start and then fail just as the OS has finished booting. It appears to be some sort of power problem, but I wondered if anyone else has had a similar problem?
This problem has occurred with both 4 or 5 work laptops and my home laptop. As you can imagine, it is more concerning that my home pc has gone wrong!
Please can someone let me know of a cure, or at least give me some real clues as to what is possibly going wrong? I have changed both power suply and battery, just in case.
Keenly hoping,
Dave

Hi
It would be very interesting to know if this strange problem occurs after the power supply and battery changing or before you changed anything.
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Bye

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i was doing my work, plugged a usb in the port, and then my screen went black and turned itself off.
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the macbook will not turn on at all.
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thanks

See if a SMC reset will restore life in the MBP:
http://support.apple.com/kb/ht3964
If not, make an appointment at an Apple store genius bar.
Ciao.

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My Mac book pro is fully charged but does not power on.No lights sounds...nothing!

try doing SMC reset, the following article tells how:
http://support.apple.com/kb/HT3964
if it still won't turn on try the following article:
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Hi, I have an old 440 CDT which does not power up. Anyone any ideas???
AC is connected, power light is on, green. Battery is dead (as in buried). When I press the power button, the following happens:
- On light is green
- Num lock key (the one with the "A" on it) flashes 3 times: long-short-short
- HDD light flashes on 1 time, green
- CD light flashes on 1 time, orange
- Popping sound in the speakers
Then it turns off again, with the power light burning green constantly.
Nothing happens on the display (tried FN F5). I also switched CD/floppy, attached both, with or without battery, no help.
I am puzzled, please help!
thx, Eric

Hello Eric
Like you know, on this way it is not possible to give any precise diagnostic, just speculate what the problem can be. In my opinion it is definitely because of defective electronic on board but what exactly it is not easy to say. Try to contact someone who has experience with notebook repair procedure.

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I am having a similar issue when transitioning from my external display via the Mini Display to DVI adapter back to the internal LCD. The screen will go black, the machine will not sleep if I close the lid, and none of they key commands appear to work. The only response I can get is the caps lock key will turn off and on. When I restart the machine, I get no details on a Kernel Panic, or anything else, so wondering if it has something to do with the video drivers.

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Try SMC and PRAM resets:
http://support.apple.com/kb/ht3964
http://support.apple.com/kb/ht1379
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Alas, my (formerly) trusty imac does not power up anymore. I've tried every step in the service manual up to the point of replacing hardware, and so far no luck. Details of the machine, the problem, and what I've done follow.
The short story is that I'm faced with replacing the power supply and/or the logic board after both passed the diagnostic tests recommended in the service manual. Since they both passed the tests, my hopes for success are not high, but at the same time, replacement costs for the two (if I wind up replacing both) run about the same as a replacement machine on ebay! On top of that, I suspect the diagnostic tests available do not test one power supply output -- so maybe it's bad but I just can't tell.
I would appreciate any advice on the situation. Also, does anyone know if the power supply for the 1st gen machines (800MHz, 15") is supposed to have both 12V and 5V outputs? Thanks a bunch!
The computer: iMac G4 flat panel 800MHz, working fine from purchase in January 2002 (right after they came out) until August 2006
The situation: I moved to Japan. Upon unpacking the imac, it would not power on -- no screen, no bong, no sleep light, no fan noise, nada.
What I have tried:
-- taking it to the apple store (they quoted a $500-$800 repair -- ouch!);
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-- test battery: checks out, 3.58v; returned battery to imac, reset PMU: no change to computer (i.e. still no power)
--test power supply and logic board points as per service manual instructions; 12 V registered at all points. tests passed. But I wonder: I have read the the PS for some imacs are supposed to have a 5V output too, but there is no test for that output on this model. I wonder if there is a 5V output on this model, and if there is a way to test for it?
for those of you counting, that was 2 resets of the PMU, one before i removed and reinserted the battery, and one after. Both PMU resets were done by pressing the button once and holding for about 1 second.
thanks any and all!
david
MacBook Pro Mac OS X (10.4.8) also, iMac G4 800MHz

Hello and Welcome to Apple Discussions.
Whilst some iMac G4 models share similar components many differ subtly.
Use this website to compare part numbers against model.
If you download (4.2Mb) this service guide there is a troubleshooting section that may help you.
kind regards
mrtotes

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Hello everyone,
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Satallite Pro 440cdx does not power up - black screen

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