Included tags: motherboard ×
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Machinist X99 Motherboards?

VCFed about 8 hours ago

I was looking at AliExpress and was startled to see motherboard kits being offered for around USD$100, which include CPU and 32GB of DDR4/ECC (strange!) RAM. They seem to be popular with the Russian crowd. Are they worth investigating? …

Wanted: AMD Ryzen 5 3600X

VCFed about 5 days ago

I'm looking for a cheap, straight pinned, 3600 that will POST. Mine is toast and I need one for several X370 motherboard projects which have the basic un-stepped BIOS. …

SUGGEST: Missing Caps in a Biostar M5VNB Socket 7 motherboard

VCFed about 6 days ago

Hello Friends, Yesterday, I found this Biostar M5VNB Socket 7 motherboard from a dealer. This one - https://theretroweb.com/mot... in my un-experienced eyes, I can guess that these few Caps are missing! Because they have marks …

IBM 5162 Prototype ?

VCFed about 10 days ago

I recently purchased an unusual IBM 5162. It can start up normally. Nameplate indicates that it is a 5162. However, when opening it, I discovered that its motherboard was really peculiar. In contrast to others, my motherboard's chips—including the CPU …

Sun (Suntac?) 286E motherboard manual

VCFed about 11 days ago

FWIW, I found this old copy of a copy of a fax in an old desktop, which contains a Sun (no, not that Sun) 286E motherboard. So I scanned it and thought I'd archive it here. The motherboard that was found still works. …

Could anyone please help me find this bios?

VCFed about 12 days ago

Or something to unlock the bios of a AU31 motherboard I need this to fix a issue where the AMD Athlon 2700+ is showing up as a AMD Athlon 1500+ and I cannot change the FSB the jumper on the board does not change anything. …

Another Leading Edge DC-2010E Leading Edge Amber Monochrome Monitor issues

VCFed about 13 days ago

No video and no beeps. The voltage rails look good at 5V and 12V. The Varta battery had leaked, but I removed it and cleaned up the leaking. There wasn't too much and the traces that were leaked on look fine. I've tried the mono/cga switch in both posi …

Looking for someone to repair PC 64K-256K

VCFed about 14 days ago

Hi, After diddling around with my PC 64K-256K, I've mostly given up. Is there a list of folks who I can pay to do repairs? Motherboard looks good, just gets stuck at boot, no output on the screen. Dave …

Macintosh IIsi Power Issues (Already recapped)

VCFed about 15 days ago

Hello, I have a Macintosh IIsi, which up until recently was working completely fine. It does not power on, and I don’t hear any signs of life coming from the power supply. The computer has already undergone maintenance on the motherboard as far as a ful …

Difficulty with expansion RAM on Baby Blue II multicard

VCFed about 18 days ago

So, I'm trying to set up a Baby Blue II IO multicard/Z80 co-processor board I snagged at VCF Midwest back in September. I'm currently trying to rig it to work with my IBM 5155 (256k, motherboard max) to start, but despite the internal diagnostics (TESTBBII …
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8-bit acorn hardware • Issue 3 boot up sound

Stardot about 19 days ago

I have an issue 3 model B motherboard and although it boots up and works, the usual boot up noise is different.The first noise sounds like it has less 'body' than I'm used to and the second noise sounds a higher pitch than my issue 4 and 7 motherboards.Is …
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Apple IIe Alps keyboard issues

Apple Fritter about 19 days ago

Hello, I am currently refurbishing an Apple IIe I recently purchased and the keyboard is giving me quite a bit of trouble. It's an Alps keyboard, the one with the tall white stems on the keyswitches. One switch was busted, which I replaced and now works …
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8-bit acorn hardware • Strange Issue 3 Model B difference

Stardot about 20 days ago

I've noticed something different in a picture of an Issue 3 motherboard that I saw.The only pictures of Issue 3's that I've seen don't have this, it appears to be a tuning capacitor with another soldered across the legs between IC's 39 and 40.Does anyone …

Help identify this part...

VCFed about 22 days ago

I was wondering if anyone recognises this part (see attached), and what would be a modern main switching transistors replacement. The two on the IBM power supply motherboard are dead, so I got some some J13007 transistors as replacements as I thought they …
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BYTE, Inc. Backplane Motherboard C61102

VCFed about 22 days ago

Does anyone have any info on this motherboard? It appears to be an S100 with 10 bus ports. Obviously, it originally came in kit form. I've looked through the first 15 or so BYTE magazines and cannot find a reference to it. I'm not positive it is even relat …
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Other 8-bit Commodore computers • Commodore 128, out of memory ERROR IN 0

Lemon64 about 23 days ago

Hi. Maybe someone could help me. I'm trying to identify a broken ram chip on my 128. I have an error OUT OF MEMORY ERROR IN 0. On C64 mode.C128 mode boots fine.Is this bit 4? I'm looking for a chip number Uxx on the motherboard. Thanks for help.Statistics …

UNCLE BERNIE'S IOU (and MMU) SUBSTITUTES IN PLDs

Apple Fritter about 23 days ago

Hi fans -may may have followed the work done by two people on substituting the MMU, see here: https://www.applefri... those who don't know yet, the MMU and the IOU are full custom ICs in DIL-40 p …

32-bit acorn hardware • RiscPC network card detected as simple card

Stardot about 24 days ago

I have a RiscPC here with network card issues. Main symptom: network cards appear as simple card type &E in *podules output and thus, obviously, don't work. This has been verified with two known working NICs. Has anyone seen this or anything like i …

Trying out the new UMB option in XTIDE BIOS r625

VCFed about 24 days ago

I decided to give this a try to see how well it works. After a little trial and error I can say this is a really cool option if you have writable memory between 640K-1MB. I tried it out in my NuXT v2.0 motherboard which has UMBs enabled for C800-DFFF. I sp …

Trying out the new UMB option in the XTIDE BIOS r625

VCFed about 24 days ago

I decided to give this a try to see how well it works. After a little trial and error I can say this is a really cool option if you have writable memory between 640K-1MB. I tried it out in my NuXT v2.0 motherboard which has UMBs enabled for C800-DFFF. I sp …
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Lisa 2/5 I/O board restoration

Apple Fritter about 26 days ago

Hi,I bought Lisa 2/5 a couple of weeks ago, in battery damaged and non-working condition.  Came with a Profile and a Lisa keyboard but no mouse, unfortunately.  Will have to get the original Lisa mouse at some stage.Not surprisingly, the I/O board and …

8087 is no longer working in NuXT v2.0 motherboard

VCFed about 27 days ago

I bought a NuXT v2.0 motherboard back in April 2020. It has worked with no issues since I have gotten it. All of the sudden the 8087 math coprocessor is not working. It is as if it is not even plugged into the socket. Now I now the 8087 itself is Ok, since …
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IBM PC XT 5160 RAM Errors on Bank 0 - It's not RAM?

VCFed about 28 days ago

I'm diagnosing this XT 5160 (64KB-256KB systemboard) that won't post. After replacing the IBM BIOS with Rudd's diag ROM I get a screen and it proceeds to test. It's failing in Bank 0 (2KB) with all chips except Parity shown bad bits. See screen... I've …

32-bit acorn hardware • Reducing sound volume on 32 bit machines

Stardot about 29 days ago

I was asked if there's any way to make an A5000 generally a bit quieter (this is for museum use, where it needs to make sounds, but not drown out all the other machines in the room!). I was surprised to find there isn't a potentiometer on the motherboard, …

8-bit acorn hardware • Smoothing caps on a beeb model 7

Stardot about 1 month ago

Hi all,I have a BBC issue 7 . I bought it a couple of years ago of FB. It had been stored somewhere damp or had got wet at some point on one side of the motherboard. It did have a sideways ram fitted which I have removed but there is some corrosion and ru …