Asrock 4Core Dual-VSTA no power to USB,PS2

[s_henya]

Hey guys,

got this mobo with no power to USB or PS2 Port.

Temporary solution is a PCI to USB card.

but i am eager to find the problem as this mobo worked until 2 days ago.

i couldn't find even one fuse on this entire board!

im afraid that the windbond chip failed-(didn't check it with scope yet)

what would you suggest?

(the image is from google for now- as no visable damage such as burnt chips or bloated caps

[stj]

Re: Asrock 4Core Dual-VSTA no power to USB,PS2

get a manual first.
there will be jumpers to switch the ps2 and usb power from 5v to 5v-standby so you can power keyboards & stuff while it's turned off.

you should check these, and the surface-mount polyfuse will be near them.

[s_henya]

Re: Asrock 4Core Dual-VSTA no power to USB,PS2

STJ THANK YOU!

i know what fuses you were talking about, they don't exist in this board.
but, i jumpered it to 5stdby it WORKS!!!

[mikan]

Re: Asrock 4Core Dual-VSTA no power to USB,PS2

lol I have this board, it's a good board, been using it for like 10+ years no problems. How do you know 5stdby or where to solder to? do you have schematics for it?