Anyone can help please? I want to repair it. Also i heard strange noises on PC Speaker. What it can be?
Also MB receive current, but didn't power on.

Any pictures of the board? Might be worth checking if any of the capacitors have any brown marks on them or look like they're bulging or leaning. The board was made during a time when there were problems with the capacitors.

capacitors are OK. No blown ones, no bulged ones.

snufkin wrote on 2021-12-23, 15:04:

Any pictures of the board? Might be worth checking if any of the capacitors have any brown marks on them or look like they're bulging or leaning. The board was made during a time when there were problems with the capacitors.

i will post board pictures. OK

also no leaning caps. I touched them
they are OK visually.
Also should i open the Northbridge heatsink?

snufkin wrote on 2021-12-23, 15:04:

Any pictures of the board? Might be worth checking if any of the capacitors have any brown marks on them or look like they're bulging or leaning. The board was made during a time when there were problems with the capacitors.

Also I think recapping it. DOes it worth?

RetroPC_King wrote on 2021-12-23, 16:05:

Also I think recapping it. DOes it worth?

If you have an ESR meter then it might be worth taking one or two of the largest ones out from near the CPU and RAM and testing them. People have different opinions about whether or not to just change capacitors even if they seem ok. I normally only change them if I can find something wrong, or if they're a brand that are known to have had problems at the time. What make are the capacitors?

I don't know what caps are bad, but what caps should I replace? I don't know what brand are them. I seen one is Chong.
Also I put a picture of same board (not mine) from Internet for reference.

also my motherboard is in PC case at the moment.

Well a few places on the internet think Chong aren't a good make of capacitors, so changing them might help. Still might be a good idea to get hold of an ESR meter to test a couple, maybe one from by the CPU and the one that's very close to the DIMM slots. If either of those tests out of spec then at that point I'd probably change any large capacitors (anything over 1000uF). There looks to be about 14 in that photo: 3 with the CPU voltage regulators (just below the yellow gameport), 4 around the CPU socket, 3 at the right of the DIMM slots and 4 between the AGP and DIMM slots.

When you say a strange noise from the speaker, what does it sound like?

snufkin wrote on 2021-12-23, 17:45:

Well a few places on the internet think Chong aren't a good make of capacitors, so changing them might help. Still might be a good idea to get hold of an ESR meter to test a couple, maybe one from by the CPU and the one that's very close to the DIMM slots. If either of those tests out of spec then at that point I'd probably change any large capacitors (anything over 1000uF). There looks to be about 14 in that photo: 3 with the CPU voltage regulators (just below the yellow gameport), 4 around the CPU socket, 3 at the right of the DIMM slots and 4 between the AGP and DIMM slots.

When you say a strange noise from the speaker, what does it sound like?

That mosfets are OK.

That noise sound like a looped skrrrrrrrrrrrr.

Sadly i don't have ESR meter. I replace all from DIMM and CPU if I can. Okay?

someone on Bought those retro hardware today said this:
Other than that - broken caps on the board (literally, they weren't bulging, they were simply broken off the board) and to top that they were counterfeit OST RLX. Seriously, I don't get why would somebody make fake OST RLX caps.

So that black/white capacitors are OST RLX? What brand should I use for replacing them?

soon I will post after Christmas a pic with my mobo which will be recapped, it worth recapping because of AMD 761 chipset.

Also, CPU can be good after blinking ON-OFF cycles when tries to power up but can't? I think replacing caps fixes that damn problem with powering up.

I've had one 7DXE+ that had the dual bios around 2002 I think, and it wasn't very god, it died after one year, now I have one 7DXE,one 7DXE+ and one 7ZX, this one is a KT133, so a bit older than the other, but all then had bad capacitors. And it is true that the 761 north bridge is interesting, but the 686b south bridge is not. One really interesting feature are the holes for heavy CPU heat sinks with screws, that wasn't so common I think, but those heat sinks neither weren't common.

This is a picture of my own GIGABYTE GA-7DXE i want to recap. It worth because of the AMD 761 and VIA 686B (only good thing of it was Legacy SB emulation). Also capacitors are CHONG and Choyl (no-names). It needs good caps for repairing.

MOSFETs are OK. Only large caps need replacing?

also, I post there for someone who wants to recap another board like mine:
Large capacitors (crucial ones):
CPU Voltage Regulators area (below the game port): 3x 10V 1200uF
CPU socket area: 4x 6.3V 3300uF
DIMM slot area and between AGP slot and DIMM slots: 7x 25V 330uF

Small capacitors around the board:
2x 16V 22uF
11x 10V 100uF

This is appliable to GIGABYTE GA-7DXE only

I found new capacitors from ELITE, PANASONIC and SANCON. These brands are good?
Also, i didn't found 10V 1200UF capacitors, and at store they given me 10V 1500UF Capacitors. Does it hurt replacing the original 1200uF with 1500uF?