Currently my Toshiba Tecra M4 tablet PC shows the initial startup Power On Self Test (POST) screen with the Toshiba logo. It then freezes. There is no beeping, and I cannot enter the BIOS (nothing happens when I press Esc or F1).
The laptop did not have any physical trauma before this freeze-up started (literally sat on a desk between working and non-working as I will describe below). I hope it's not a hardware problem, but since I can't even get into the BIOS, I don't have my hopes up.
Here is what happened immediately before this symptom began to happen: I had the computer on (and it was working perfectly) and it went into stand-by mode on its own. When I tried to revive it, the screen stayed blank. After waiting around for a few minutes, I held down the power switch to force it to shut off. I then turned it on and there was a message saying "Resume failure" and it froze. After waiting for a few minutes (the Toshiba POST screen never shows up) I turned it off again.
After that, every time I turn it on now, the system hangs at the initial Toshiba screen and does not respond to any keyboard commands. After I press Esc or any other key 15 times (in an effort to get to the BIOS) the computer starts beeping anytime I press a key. Otherwise, there is no beeping that occurs before that.
I have tried the following:
1) This laptop has a factory reset option where it copies an image from a hidden partition to the main hard drive to make its contents the same as the factory state. I tried to access it several times (by holding down "0" and turning it on). Once I got lucky and it actually went into the factory reset screen. I took the opportunity to wipe the hard drive back to its factory state. The process was successful, but after reboot, the same problem remains. I have not gotten lucky at activating the factory reset screen again since.
2) I opened the laptop and checked all of the visible connections.
3) I have disconnected all power (the battery, power cord, and the little NiMH battery connected to the motherboard) overnight, but that did not help.
4) I removed the hard drive and checked it on a different computer. It seems okay (ran chkdsk on it with no issues).
Do any of you have any suggestions? Since I cannot even access the bios, how can I further troubleshoot this? Is there a way that I can make it display the POST process instead of just displaying the logo?
I am considering spending the ~$300 to maybe have it repaired by motherboard specialists (it still is a nice laptop), but I am very interested in fixing it myself if possible to use this malfunction as a learning opportunity.
Thanks in advance for any suggestions you might have!