I just replaced the motherboard in a HP dv9925nr. Now, when i power up i get the message, Operating system not found.
Next power up, F10, go to Diagnostics and the test says "No IDE device". Is disk drive bad? hang on....I remove disk drive and plug into to secondary bay, power up, F10...Diagnostics now shows a secondary disk!!!! I press test and the drive is now being tested!!!
Can I "ass-ume" that the mother board I have just put in has a bad primary controller?
Sorry to dig up this old post. Strange enought I have the same issue, and same model number dv9925nr.
When the drive is on IDE port 1, the notebook doesn't pick it up. No error or anything, it is as if it's not installed. On port 2 it boots, until exactly after the machine is supposed to boot on windows, then reboots itself.
Some other strange... I haven't use the computer for some time (about two years), last week I turned it on, and it booted right into windows on port 1... after a few hours (maybe less) it hanged and returned to the former state, ide not detected.
I tried other HDD, same results. I tried removing the DVD drive, it flashed something briefly after detecting the hard drive on post but I could only read "incomplete..." and the machine rebooted. I wasn't able to get back the same message again.
Botting from USB does the same thing as booting from second drive, machine reboots itself after POST.