Member Avatar for Michaelross

Hi eveyone! I have a mother board issue with a HP Pavillion XT936, or something like that?! The BIOS checks fine but the board will not recognize the CDROM Drives at all. Called HP for the reset sequence and location ofthe CMOS on the board but they were no help. They just kept telling me to send it in for repair and would not divulge the location or the jumper settings for the CMOS. Can anyone help? Thanks

Hi

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OP reported that the Pavilion's BIOS runs but the board never sees any CD-ROMs; replies in-thread ranged from controller/drive failure () to the usual battery/jumper reset suggestion (), and later posts raise BIOS-password and failed-update issues (, , ). The practical approach is methodical troubleshooting rather than guessing the CMOS jumper location or assuming a single fix.

First, confirm what the BIOS actually sees. Reboot into Setup and note whether the IDE/SATA controller is present and whether any optical device is listed. If the controller is present but the drive is not: check the ribbon/data cable orientation and pins, swap to a known-good cable, verify the drive gets molex/SATA power, and try the drive on another machine (or try a known-good drive in this board). For PATA drives check master/slave settings or cable-select placement. If the controller itself does not appear in BIOS, suspect a motherboard/controller fault.

If you still want to clear CMOS: with power removed and mains unplugged, look for a clearly labeled jumper near the coin cell (CLEAR, CLRTC, CLR_CMOS, JBAT1) and follow the jumper’s short procedure; alternatively remove the coin cell with the system unplugged, wait (several minutes) and press the power button to discharge residual caps before reinserting. Note that many HP notebook models store supervisor passwords or security flags in non-volatile areas that are not cleared by battery removal; removing the cell will not always remove a BIOS password.

Take ESD precautions, document model and serial, and keep notes/photos of jumper/battery locations. If a BIOS flash failed or the chip is soldered (as discovered), board-level repair or a service lab is often required; gather service manual pages or the exact model number before contacting HP or a third-party repair shop.

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Member Avatar for ikenfixit

That figures.. The CS just keeps getting better and better.. They are the WALLET MINERS! Plain and simple.. If you dont pay they wont play. What is the issue you are having on your notebook??

Member Avatar for ikenfixit

Could be a bad drive.. Also.. If its the controller you are in trouble. Does it show in BIOS?

Member Avatar for zipfly

is there a back door password for bios password lost or forgotten to reset password

Member Avatar for alc6379

Just use the instructions

To yank the battery from the motherboard. It does the exact same thing as pulling the CMOS jumper.

commented: hes right +0
Member Avatar for zipfly

I guess I forgot to ask for a backdoor for forgotten passwords for the HP pavillion ze4900 notebook pc

Member Avatar for GeorgeTown

Newer BIOS chips are soldered to the motehrboard. I found that out after my DV6000 BIOS update failed. There is a crisis receovery method that may work, just search the forums and the web. When mine filed, it didn't power on at all! called HP and they wanted 300 bucks for the repair. searched some more and found sent i to them and they did it for 100 bucks. HP should waive expired warranties when it comes to BIOS failures.

Member Avatar for lakachew

My HP pavilion dv7 is not powering up at all. it just blinks when i press the power button what do you think i should do to resolve the problem. is there any way i could reset the mother board.

Best regards,

Member Avatar for Morbidious

i have a hp pavilion dv2000 and i forgot my password to my bios how do i get pass that i tried unplugging the cmos battery and it still didnt work plz help

Member Avatar for caperjack

i have a hp pavilion dv2000 and i forgot my password to my bios how do i get pass that i tried unplugging the cmos battery and it still didnt work plz help

hi, we do not offer such help here you will need to use www.google.com for answer

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