Are you using an AT or ATX supply?
CPU gettng hot? Voltage for DIMM is 3.3 V?
A bios code POST code analyzer is helpful to know if something is executing.
A multi-meter to measure the AT voltages (or shorts), then the dual plane voltages off the socket 7 (to check for the 2.2 v and 3.3 v)
How are the larger caps looking? They might need to be replaced.

Pickle wrote on 2026-07-01, 20:30:

Are you using an AT or ATX supply? CPU gettng hot? Voltage for DIMM is 3.3 V? A bios code POST code analyzer is helpful to know […]
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Are you using an AT or ATX supply?
CPU gettng hot? Voltage for DIMM is 3.3 V?
A bios code POST code analyzer is helpful to know if something is executing.
A multi-meter to measure the AT voltages (or shorts), then the dual plane voltages off the socket 7 (to check for the 2.2 v and 3.3 v)
How are the larger caps looking? They might need to be replaced.

Hi Pickle. It's an AT PSU. DIMM is set to 3.3V

I have a multi meter, so I can go and check the AT PSU voltages.

I'm not sure how to check the dual plane voltages off the socket?

Large caps all look fine. As I said, the board was tested and sold as working.

Hi,

@Pickle already mentioned the most promising next debug steps, but before doing these I would try clearing the BIOS with the JBAT1 jumper as you didn't mentioned doing it in the opening post, might be only some incompatible configuration getting stuck.

MagefromAntares wrote on 2026-07-01, 20:38:

Hi,

@Pickle already mentioned the most promising next debug steps, but before doing these I would try clearing the BIOS with the JBAT1 jumper as you didn't mentioned doing it in the opening post, might be only some incompatible configuration getting stuck.

Hi MagefromAntares.

Sorry, should have mentioned above, but I've already tried that as well.

Was this CPU in the old board when it died?

Repo Man11 wrote on 2026-07-01, 20:47:

Was this CPU in the old board when it died?

Hi RepoMan11

Yes, it's the same CPU which is another reason why I think it may be the issue.

Retro-o wrote on 2026-07-01, 20:37:

I'm not sure how to check the dual plane voltages off the socket?

Theres a image of the pinout in the thread below. I think vcc2 is the vcore( 2.2 v) and the vcc3 is IO (3.3 v) any of them can be used to check.
Socket 5/7/SS7 (Motherboard) Tweaker (Released)

What do you mean when you say the previous motherboard died... ?

Do you know all components individually work except the motherboard..

So just an update on this one, I’ve ruled out the PSU, Monitor, CPU and graphics cards. I’ve managed to borrow known working ones and it has changed nothing. I have noted that the keyboard lights (caps, num lock) flash when I turn the power on.

Voltages have been checked on the CPU Socket and PSU. All are good.

I tried stripping board down to the bare essentials, motherboard, CPU, PSU only - no drives or cards. The speaker now beeps when there’s no RAM inserted. - was before when everything was connected up. But it also beeps when there is RAM inserted.

DIMM jumpers are set to 3.3V . I’ve tried in x2 SD32MB DIMMS followed by a 64Mb DIMM in DIMM slot 1 - all beeped. I tried the same with DIMM slot two and again all beeped. I tried the pair of 32mb DIMMS, one in each slot and they beeped.

I believe this may be the problem and what is preventing POST.

Any suggestions for moving forward would be welcome

MikeSG wrote on 2026-07-02, 11:38:

What do you mean when you say the previous motherboard died... ?

Do you know all components individually work except the motherboard..

The previous motherboard has a fault. There’s a particular chip that’s heating up to an extremely hot level. The processor doesn’t heat up.

I’ve tried another known working PSU, CPU, monitor and graphics card.

getting beeps is very good and sounds like a memory problem, what bios brand and how many beeps (i.e short / long counts)
based on the manual you can run simm's in pairs and 1 dimm (sdram) in the slot. I would stick with running with the sdram dimm at first.
you can try using isopropyl alcohol. First wet the the dimm stick and rub off with a qtip until no dark material comes off. Spray the first dimm slot and use the clean dimm stick and pop it in and out of the slot to clean off the pins. Once dry try powering on the system again.

the manual says sdram and 5v edo can be used at the same time. But then later says its not recommended to mix 3.3 V module with 5 v module.
so i think this means if your going to use both memory types use same voltage rated memory (but i think 5v sdram is rare). Dont run your 3.3 V sdram at 5V.
personally i dont bother using the simm sockets, 1 dimm can get you all the memory you need and the manual says up to 256 mb on that one slot alone.

Pickle wrote on Yesterday, 15:51:

getting beeps is very good and sounds like a memory problem, what bios brand and how many beeps (i.e short / long counts) based […]
Show full quote

getting beeps is very good and sounds like a memory problem, what bios brand and how many beeps (i.e short / long counts)
based on the manual you can run simm's in pairs and 1 dimm (sdram) in the slot. I would stick with running with the sdram dimm at first.
you can try using isopropyl alcohol. First wet the the dimm stick and rub off with a qtip until no dark material comes off. Spray the first dimm slot and use the clean dimm stick and pop it in and out of the slot to clean off the pins. Once dry try powering on the system again.

the manual says sdram and 5v edo can be used at the same time. But then later says its not recommended to mix 3.3 V module with 5 v module.
so i think this means if your going to use both memory types use same voltage rated memory (but i think 5v sdram is rare). Dont run your 3.3 V sdram at 5V.
personally i dont bother using the simm sockets, 1 dimm can get you all the memory you need and the manual says up to 256 mb on that one slot alone.

Hi Pickle

It’s an AWARD bios. The beep is short and continuous. It doesn’t stop.

I’ve got isopropyl alcohol here so I’ll try giving the contacts a good clean as you suggested. I appreciate it may be the DIMM’s themselves but out of the three I have I’d hope that one would at least work.

yeah its a memory problem:
Repeating (endless loop) Memory error Check for improperly seated or missing memory.

Have tried the isopropyl alcohol on both the DIMM Slots and the RAM sticks themselves. Managed to a good bit of dirt off. Still no joy however. Still beeping away regardless