Black screen problem. But weirder

Nov 3, 2018
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I have a Toshiba Laptop Satellite C55-C5379. Everything worked fine until about a year ago. (BTW my battery broke so I'm using the Charger for power) For some reason the screen stopped turning on. The computer still ran, but the screen was black. Then I found out that If I turned it on and then immediately closed the screen, waited for the Windows startup sound, then opened it, the screen would be on. About 2 months later instead of waiting for the Windows startup sound, I had to wait about 30mins. before the screen turned on. That worked for another month and now if I'm lucky enough to get it on, it goes to the "Your PC did not start correctly" screen. I can't reset the Laptop because when It gets to the step of restarting, the screen doesn't go on and I have to shut it down (By holding down power button).
I've tried holding down the power button for over a minute, Starting in safe mode, opening up the laptop and cleaning it and Checking RAM sticks to see if they popped out. Right now I'm thinking it's the graphics card but I can't be sure.

What do you think?

Don't mind the very silly username. (Not my idea)
 
Try this...

1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. Turn on the laptop.

NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.

If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.

If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.

You may also want to try hitting CTRL + SHIFT + WIN + B to try and reset your graphics driver as another possible fix.
 
Try this...

1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. Turn on the laptop.

NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.

If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.

If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.

You may also want to try hitting CTRL + SHIFT + WIN + B to try and reset your graphics driver as another possible fix.
 
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