I have a problem with my Win-7 desktop PC (HP p6280t). (The screen remains blank, the HDD activity stops and there no cursor and the keyboard is unresponsive a few seconds after the start-up cycle.) Details below.
There are several strange symptoms that started with this problem and seem to be related:
There are several strange symptoms that started with this problem and seem to be related:
1. After any power-up or restart cycle the Bios screen will flash momentarily showing the various Function keys (F9, F10, F11, ESC).
2. After this, the screen goes blank with no cursor, but remains active. In other words, the monitor does not go into power saving mode.
3. The keyboard becomes unresponsive meaning the Caps-lock and Num-lock toggles are not working.
4. There are no beeps or noises during start-up.
5. All HDD activity stops when screen goes blank. (No amount of waiting will cause it to start from this mode, the only way forward is to do a hard power-off and start again.)
6. The machine is unable to boot from CD/DVD rescue disc even though bios is set (by default) to boot from CD/DVD first.
7. I am unable to select System Recovery (F11) during startup
8. I am able to select Bios Set-up (F10) during start-up, but even after resetting everything to factory default settings, it still fails to boot. (All HDDs and memory report as normally from the bios screens.)
9. If the Bios screen is left on the monitor for 5 minutes or more, then I select Exit and without saving changes, it WILL boot into windows normally and everything seems to be working normally. (This the only way to get the machine to boot.)
10. If after booting as in step 7 above, shut-down and restart will produce the same blank screen during start-up.
I am wondering if this could be a power-supply problem or or perhaps something corrupted on the start-up boot sector of the C-drive. I can't seem to understand how I can get past the initial problems by going into the bios set-up screen for a few minutes then exiting. Any ideas?
I was able to complete a full scan-disc on the C drive, but this didn't find any problems and didn't change anything.
I was able fully disable the hibernate mode and deleted the hiberfil.sys file, but this also made no difference.
(Updated to further clarify original symptoms)