If the power supply still works, you can make a pinout diagram using a voltmeter. Just check the voltage coming out of each pin and write them down. If it doesn't work, you'd need to find the IBM documentation. IBM was known for having really good documentation, so the pinout is probably in the …

Odd. Evidently the motherboard wasn't getting enough power to work correctly. Glad it's working now.

The recurring beeps are usually either "video error" or "RAM error". It varies by motherboard, and might be in the motherboard manual if you can find a PDF of it. I would try a different video card, and then try different RAM, and see if either one fixes it. Also try reseating the ram, and check the …

The black and green wires connect to the power switch on the front of the AT case. They allow using an AT power switch with an ATX power supply and AT motherboard.

Quick piece of advice: DO NOT run anything older than XP with larger than a 128 GB partition. ... This goes for ... Windows 2000. ... This is not true. You can install Windows 2000 without problems on a HDD that already has a NTFS partition > 128 GiB. But you should apply SP4 as soon as possible …

Quick piece of advice: DO NOT run anything older than XP with larger than a 128 GB partition. Even if you get it to boot and "work", if you put more than 128 GB of data on it, the FAT table will get corrupted and you will lose all your data. There were some hacks to get around this, but if your hack …

The reset switch symptom is probably the power good test. Before the machine boots, it tests the power quality. If it thinks the power is bad/insufficient, it will refuse to start. The reason it happens with the faster processor is probably because it draws more power. Hitting reset a couple of …

Some pictures, as requested. Filename IMG_20200224_203247.jpg File size 758.15 KiB Views 1758 views Filename IMG_20200224_202438.jpg File size 885.07 KiB Views 1758 views Filename IMG_20200224_202508.jpg File size 838.88 KiB Views 1758 views Filename IMG_20200224_202450.jpg File size 770.48 KiB …

My current oldest brand name machine is a Compaq LTE Lite 25 laptop. It's a 386 SX 25 Mhz, 120 MB Hard Drive, 4 MB RAM, and a Page White VGA Black and White display. Completely working, though the battery is really weak as you'd expect. It's currently running DOS 6.2 and Geoworks Ensemble. IMG_ …

The Zenith 248 was one of the most common PCs used by the US Air Force. I would bet they had many thousands of them. Not sure if the one you are getting was an Air Force computer, but it's statistically probable.

Greetings, Hi. I'm new to the board, but have been building computers since 1990. I did it as a full time job for 5 years, 1990-1993 and 1997-1998. I averaged about 3 a week during that time, and a few a year other years. So I'm probably in the 800 machines range as far as builds. I've normally …