VOGONS


First post, by bjwil1991

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Back in January, I received the J-Mark/Jetway OPTI-495SX 3/486EB motherboard.

The board suffered a battery rupture and caused corrosion in a small area (the IC socket for the EPROM BIOS, the first XT 8-bit slot, the SN74F245N Transceiver, 2 pins on the 486 socket, and a bit on the jumpers.

After cleaning the corrosion off, everything looks a lot better, except for the IC socket for the EPROM BIOS and the SN74F245N Transceiver since they both have rust and the first 8-bit XT slot is in good shape, but it'll be replaced for safety reasons.

Original gallery from late January: http://imgur.com/gallery/7CgT4CQ

I did a deep cleaning using soapy distilled water to wash the board (used a spray bottle for that), a spray bottle of plain distilled water to rinse the board to rid of the soapy water, and a spray bottle of 91% IPA to rid of the water to make the board nice without getting any bad contaminates on the back and top of the board.

bgWCSDMl.jpg

Dziq13wl.jpg

Gallery: http://imgur.com/a/x6jyWJy

Edit: Title got spelt incorrectly.

Last edited by bjwil1991 on 2021-10-27, 06:31. Edited 2 times in total.

Discord: https://discord.gg/U5dJw7x
Systems from the Compaq Portable 1 to Ryzen 9 5950X
Twitch: https://twitch.tv/retropcuser

Reply 2 of 3, by bjwil1991

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Swapping the 386DX/486DLC board and this one around for my DOS games and it'll use an Intel i386 DX-33 and i387 with a VLB video card and testing the MR BIOS to see how that performs and if it has LBA support.

Discord: https://discord.gg/U5dJw7x
Systems from the Compaq Portable 1 to Ryzen 9 5950X
Twitch: https://twitch.tv/retropcuser

Reply 3 of 3, by bjwil1991

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Good news: the new IC socket and the Transceiver are installed.

Bad News: shows ---- on my POST card.

Possible suspects:

1) an erratic trace
2) insufficient solder
3) grounding issue

Discord: https://discord.gg/U5dJw7x
Systems from the Compaq Portable 1 to Ryzen 9 5950X
Twitch: https://twitch.tv/retropcuser