OK, I have a Compaq Presario 1255 laptop that had a loose power connector. I soldered in a new connector (I'm experienced at doing this).
It now powers up and passes the Compaq diagnostics utility. But, it doesn't recognize the hard drive. It sees and reads from the CD-ROM so I'm pretty sure the IDE interface is OK (i.e., I didn't fry something while soldering).
The BIOS doesn't allow for much manipulation of the CMOS. But, it shows there is 'none' under Primary IDE. The CD-ROM shows up under the Secondary IDE device heading.
I have tried 2 separate hard drives (one is the factory original). Neiter is recognized. They both are recognized when I place them in a 2.5" drive USB enclosure and attach them to another computer. This shows me the drives are formatted OK and not corrupted.
I even can run the Windows XP Update Setup CD and get the laptop to recognize one of the 2.5" hard drives if it is connected via the USB port and in the 2.5" drive enclosure.
I'd like to get this computer back up and running. Ay ideas? I can pull the motherboard and recheck the power traces but pulling it is a hassle. I'd like to get ideas here first.