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I acquired an Apple IIGS nearly a year ago and although everything works great, it gives off an unpleasant odor. When off it's only detectable if I put my nose up against the case, but after it's been running a few minutes it's discernible from at least a few feet away. I haven't used it much...

I was disassembling an Apple IIGS power supply with a rather unusual design where the heatsink is mated to the housing with thermal compound in between. Removing the circuit board from the enclosure exposes the compound. Normally I wouldn't think anything of this, but I recalled safety...

I recently acquired a IIGS and after booting into GS/OS it emits a repetitive clicking/ticking sound from the internal speaker. It also produces tones with pitches that vary depending on exactly what is selected in the GUI. I've found posts elsewhere (Clicking GS, IIgs ticking noise) which...

I won an eBay auction for an IBM 5151 Monitor that was utterly destroyed in transit. The seller's packing job seemed above average. There was a foam pad plus bubble wrap within an inner box which was placed in an outer box containing additional packing material. I do think they could have...

I previously brought up some hard drive issues in my XT-IDE and MFM Hard Drive thread. I don't see a way to change the subject, so I'm starting a new topic with a more accurate title, given that the problems have nothing to do with XT-IDE after all. Anyway, I have an IBM 1501492 fixed disk...

I was trying out the composite output (NTSC) of my IBM CGA card and am experiencing color issues. Plain black & white text is OK, but there's no color in text mode and in graphics modes the TV often flickers and fails to sync properly. When it does hold steady, the colors are typical off...

I currently have an XT with a 5153 color monitor and was considering looking for a monochrome display card plus an IBM 5151 monitor to use in a dual-monitor configuration. The 5151 pops up on eBay frequently, but the vast majority are untested. The color 5153 will present a blank white screen...

I've been trying to get my IBM 5160 XT back up and running. First there was a blown cap on the MFM hard disk controller. I replaced that and was able to boot from the hard drive again. I also bought a XT-IDE board, pre-assembled by Blue Lava Systems. I popped it in leaving the default...

I had read that although they are physically different form factors, an AT power supply can be connected to an IBM XT motherboard. That's what I've done for now given that my XT PSU is broken, but at first I had trouble plugging in the P8 and P9 connectors. Looking at the new ones on the...

When inspecting the expansion cards in my IBM 5160 I spotted burn marks around the component labeled CTS8419 761-5-R220/330 adjacent to capacitor C5. It must have overheated in the past, but the floppy drive (one internal drive is connected) works just fine. Any idea what happened?

I have an IBM 5160 which I hadn't powered on in roughly 10 years. Upon flipping the switch it emitted an awful squealing sound followed by a pop and a foul odor. I believe one of the tantalum capacitors on the hard disk controller shorted out at this time, and I posted about that in a separate...

I'm trying to fix up an IBM XT (5160) which I haven't used in about 10 years or thereabouts, and it isn't recognizing the 10 MB hard drive. When looking things over, I spotted a blown tantalum capacitor (C18) on the HDD controller. I presume this is the culprit, and should be replaced with a...