I was trying to fix a problem with an old Thinkcenter M58 PC that makes the fan either working an full or at the lowest speed (depending on the occupied ram slot) I have tried to remove nearly every caple from the mother board , make CLR_CMOS and CLR_CMOSHW reset at the motherboard , changing some bois options , Put i have failed and give-up , Now i have a new more serious problem and dont know what make it appear , When I try to start the PC after a shutdown or make a system restart , after about 1 second and before the bios screen appear i hear 9 fast beeps (3 beeps - short silence - 3 beeps - short silence -3 beeps) then the screen turn off , i can hear the PC is still running but noting happen .
After i press the turn off button for 5 seconds the computer shutdown , then pressing the turnoff button again the computer starts normally and so on !!
So I think the hardware is functioning normally , but having to do this every time i turn on the PC is so irritating and noisy , and it wasn't like that when i started fixing the fan problem !
PC : Thinkcenter M58p Motherboard : LENOVO (LGA 775) Bios : LENOVO 5CKT77AUS Operating System : Windows Xp Pro Chip Model : Intel Q45/Q43
Edit:
May be i was wrong , I have flashed the Bios again from inside the Windows < i have disabled all the checks so i can flash the same version again , Now the beeps changed I can hear 16 beep (4-4-4-4) , also pressing enter to get the list of options inside the bios is no longer working , I have managed to enter using F1 , found the following at the main page : Machine type/Model : INVALID , System Serial Number : INVALID , UUID : ffffffff-ffff-ffff-ffff-ffffffffffff
I Canot find this beep code neither at the Thinkcenter M58 Manual posted by DavidPostill nor at the link posted by Dave .
I have tried Using the Setup Utility to load defaults and then press F10 to Save and exit but nothing changed , although i can still log into the windows after the second restart .
I will try to Perform a Boot-block recovery as per the manual then post the result again , thanks for the help .