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Ah. Sorry, I gotta get used to a Compaq Portable VDU card (the composite on that only works when you press CTRL-ALT-<).

Sometimes the composite out only works with the system booted up and with a shortcut key to switch to the composite out in some cases.

Got $35 saying it's not.

Does that get soldered directly onto the pins on the EGA Wonder card or not really?

Sorry for bringing a close to 2 year old thread back to life here.

The MF-100 doesn't work at all, so I ordered an AST SixPakPlus RAM RTC Serial card, some shock mounts and a ground strap for the case (so I can mount the dual floppy drive and the 5.25" half height...

Got the XT-CF installed in my Compaq Portable and it ain't working. It sees the card and formats, but upon formatting completion, it shows an error saying not ready reading drive C.

I have it in...

8088 Compaq Portable 1 (dual FDD): https://www.ebay.com/itm/294043909561

8088 Compaq Portable Plus (single FDD, 10MB HDD): https://www.ebay.com/itm/294044008506

Both of them have common issues...

Cleaned the corrosion off of the MF-100 card and I've yet to test it to see what happens.

The keyboard has been repaired successfully, but one of the mounts snapped off of the housing and that needs repair before I did the foam and foil capacitive pad replacements.

2 issues to fix now:...

Or possibly because of the pandemic they jack up the prices because they have to pay bills or rent somehow.

You would have to thank LGR and 8-Bit (1-Byte) Guy for getting the prices driving up a long stretch.

I was lucky to get the Compaq Portable 1 for $133 + S&H and taxes and there's one going for...

I'll post photos soon once I get everything fixed up and planning on sprucing up the system with cleaning and retr0briting of the keys (gotta get Salon Care 40 Volume) and the case (cleaning).
...

I was thinking about making a modern PCB using an IBM Model F layout (buckling spring keys) and see how that works (was thinking about 3D printing contact pads, but that might not work at all).

Got both of the floppy drives working by using machine oil in the spindle motors and greased the rails with White Lithium Grease. Formatted a diskette, made it bootable (copied the command file after...

Progress on the computer: the HardCard 20 has been successfully repaired and it boots up.

The keyboard's foam contact pads are disintegrated and the floppy drives don't work (cannot format a new...

Got a Compaq Portable 1 that has the dual floppy drive configuration and has the following installed internally:

1) RAM expansion + RTC + Serial card (Varta leaked and a few items got corrosion,...

Gorgeous. Going to diagnose my newly acquired Portable 1 that has a dual 360KB drive setup and a HardCard (might pull the data off of it if it works).

Waiting for the foam contact pads to arrive...

May I see a picture of the Cheetah 8-bit MIDI card, please? I've never seen one manufactured by Cheetah before, only Music Quest, Roland, and Passport are the ones I've seen.

Replaced the IC socket for the EPROM BIOS chip and the TI SN74F245N Transceiver along with trace patching and it shows ---- on the POST card.

Lights that illuminate:
+12V
-12V
+5V
Frame
Reset...

That's a beautiful adapter. If I had an Amstrad PPC640, I would get something like this for the XT-IDE card, sound card, and so on.

The board is a J-Mark Computer Corporation OPTI-495SX 3/486WB v1.1 and it has a 238 pin LIF Socket 2 for the 486 CPUs and a 387 LIF socket in the center.

Gave it another alcohol bath and scrubbed...

Got this beaut a few days ago and a couple of small spots/areas had corrosion from the leaked out NiCd battery (the photo below is the before photo, click on the photo to see the entire gallery).
...

Got a couple of boards that use the Dallas RTC chips, but 1 is undergoing repairs still and the other is a board I got close to a month ago uses one, but I'm not sure if the RTC battery is flat or if...

Agreed. The Panasonic used L G R G for their drives back then (changed the order for my CR-563-B drive and sound card and others used another layout.

Look up the pinout for Mitsumi, Panasonic, and...

I do agree with that with the noise issues. It could be an amplifier issue.