820-2530-a sometimes black screen

vsa100

New member
Hi!

I have a 820-2530-a board that sometimes does not boot, i have black screen and the white led stays always on,
but when the system boots is stable for an entire day!

What you suggest to check?

thanks
 

2informaticos

Administrator
Staff member
"sometimes does not boot, i have black screen and the white led stays always on"
No other sign, like chime, or USB activity then?

First check resistance to ground at 3V42 power rail, in ohm mode.
You should get more than 30K.
 

vsa100

New member
No, when it doesn't boot i only have the fan spinning: no chime, no video.
5.05v on usb ports.

Sure, i'll check 3V42 rail later.

thanks
 

2informaticos

Administrator
Staff member
Aaah, so the board starts always.
But sometime stays on without any activity.
Be sure no USB activity that moment.
Use USB OSX pendrive with LED link, to be sure; disconnect internal HDD.
Check if CPU gets voltage and see if drops a bit after few seconds.
Clean RAM slots and check one memory module at a time, each slot by separate.
 
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