jmgs082598
asked on
my motherboard not booting
could you please help me to solve a problem with my motherboard
I have a motherboard 486 AT with Intel486/dx2 processor which have a usai (SC-9204-A 4LO8F1067) and SIS 85C206.
I have problem booting because not display is on the screen
and no beeps heard.
I checked the power supply. It's good.
I tried to boot with the video card as the only board in the system and removed it as well.
I don't have the motherboard's manual.
Could you please guide me about the jumper position and case's conecters position.
thank you
I have a motherboard 486 AT with Intel486/dx2 processor which have a usai (SC-9204-A 4LO8F1067) and SIS 85C206.
I have problem booting because not display is on the screen
and no beeps heard.
I checked the power supply. It's good.
I tried to boot with the video card as the only board in the system and removed it as well.
I don't have the motherboard's manual.
Could you please guide me about the jumper position and case's conecters position.
thank you
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
If you do not hear beeps is the speaker plugged in? Is any memory pluggeg in? Is memory in bank0? Yuo should hear beeps even without a display card. If all of above is correct, you either have a wrong jumper, or a bad processor. Is is plugged in correctly? Bad cache?
ASKER
to public:
the speaker is plugged in. I plugged the memory en other motherboard and is ok. all eight-banks have memory simm.
I plugged the processor and cache in other pc and are ok.
my doubt is about jumper position, but I don't know the FCC ID and manufacturer.
I only see UNIC2. IS IT KNOW BY U?
the speaker is plugged in. I plugged the memory en other motherboard and is ok. all eight-banks have memory simm.
I plugged the processor and cache in other pc and are ok.
my doubt is about jumper position, but I don't know the FCC ID and manufacturer.
I only see UNIC2. IS IT KNOW BY U?
You can experiment. 486 MBs use only 5V, so you will not damage anything, The jumper options are typically clock speed, cache size, FPU present. If you have a goo processor, good memory, and no cards pluuged in, you should hear video missing beeps. Make sure the power supply is good.
ASKER
to Public:
I experimented plugged a good processor and memory but I don't hear beeps.
might the Motherboard is dead?
I experimented plugged a good processor and memory but I don't hear beeps.
might the Motherboard is dead?
You may want to measure thr +5V on the MB. Also check that the reset switch pins are not shorted. It is quite likely that the MB is bad.
http://www.fcc.gov/fcc-bin/ead
From there you can try to find the manufacters website