What I have
I have two 800XL's (NTSC) which were both in storage for 10+ years. I only had one Atari power supply, which I learned was the "ingot". Both worked prior to insertion in storage.
I also have two 1050 drives, each with their own PSU. Both of those power up just fine. I did not have them connected when I tested the 800XLs.
Neither will power up. Power LEDs do not illuminate. Nothing on the screen.
What I tried
1. Initially tried connecting the PSU to the computer, but no power LED and nothing on the screen. No smoke, sparks, or explosions either. Had it connected about 10 seconds to each.
2. Tested a 5V ATX PSU (correctly jumpered and tested with a hard drive). Butchered the ingot PSU's DIN cable and wired it into a molex connector (black wire to red, black wire w/white stripe to black). Connected to the computer. Tested across the leads and read 5V DC. No power. Also tested with my Amiga's Bigfoot PSU w/molex connectors, but no luck either. Same results.
3. Connected to TV with RF and then to a monitor with monitor cable, nothing on the screen.
4. I wore a nerd bracelet and disassembled both. Caps are not visibly leaking. Chips are NOT socketed to the board.
Does anyone know of a troubleshooting guide or tips to try to make them work? I have minimal electronics experience, but do have a pretty good voltmeter and am comfortable soldering. I realize I might need to replace components or the system outright (if I can find a working one for a reasonable price).
Edited by Vyncynt, Thu May 16, 2019 11:19 AM.