Hello everyone, long time reader, first time poster. Got a Compaq Prosignia 200 out of the e-waste bin and it was all going well. It turned on, had scsi drives, recognized IDE drives, worked through the weird on hard disk bios by find the right softpaq. Even got a CF to IDE adapter to work with a 4Gb CF card. I installed Windows 95 and everything was working out great. Once I booted and was installing Microsoft Plus it started to go fine, got to 14 percent and locked up. Alt crtl del didn’t work so I figured hard power off and power on. Now it doesn’t post. Just power LED, cd rom spools up, psu fan and cpu fan spool up, but no post.

I’ve tried reseating everything including the expansion board with the ISA and PCI slots, reseated the cpu, swapped CPU’s, swapped EDO ram, removed all expansion cards: video and scsi. Tried the original Cirrus Logic PCI 1mb card, a Matrox Mystiq PCI video card and nothing changes, no boot and no beeps whatsoever.

I took the power supply apart and the fuse is still there the metal ends are visible but the center looks like it is covered in white paper. It is a proprietary AT power supply with 2 AT motherboard connectors and 1 specialized 11 pin connector that goes from the motherboard to the power supply and feeds the front led the hdd signals among the 3.3v wires I believe.

Is there any hope of reviving this system? It might be a crude analogy but when my XBOX360 red ringed it was usually due to heat and it would need a reball/bga repair. Maybe that’s it but what do I look for/try. I’m not trying to spend money on this system just learning more and seeing if I can repair it. Power supplies anre $120 - $200, motherboards are $160 to $700. Not worth it at all. All capacitors look good on the power supply and motherboard/expansion board.

The CMOS batteries on the motherboard and expansion board were fine/not leaking and the time was retained. They are soldiered to the boards with a pin connection for external batteries.

Any help you can provide will be greatly appreciated.