Showing results for 
Search instead for 
Did you mean: 
New member
1 0 0 0
Message 1 of 2
Flag Post
HP Recommended

Power on password issue

500-424 desktop

I recently purchased a used 500-424 desktop. When I turn it on, there is a prompt for a power on password. I contacted the seller and they say the computer has not worked in months (I found a bad power supply) and they dont recall the password. I replaced the harddrive and plan on installing a new OS. I removed the cmos battery for 120 minutes, tried the cmos reset jumper, and it still asks for a password. Anyone have any ideas? I just need to hit the bios so I can install a new OS.

Level 20
Level 20
113,303 103,480 16,280 25,000
Message 2 of 2
Flag Post
HP Recommended

Power on password issue



I am looking at the picture of the motherboard below...


There are two jumpers.


One clears the CMOS and one clears the P/W.


Usually you have to shut down and unplug the PC.


Move the P/W jumper over one pin, plug in and turn on the PC.


The P/W should now be cleared.


Then shut down, unplug the PC and replace the P/W jumper to its original position.

0 Kudos
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation