820-01521 No power

Hi!

No power, no fan spin.

Board looks in good shape, no corrosion.

PPDCIN_G3H 20v
PP3V_G3H 3v
PPBUS_G3H 12.7v
PP3V3_G3H 3.3v
PP3V3_S5 3.3v
L7030 12.6v
L7230 0v
L7210 0V
L7430 0V
L8102 0.995 V

I don't know what else to measure. thanks
 

2informaticos

Administrator
Staff member
How the failure appeared?

Do you get voltage at L7290?
Also check U8210/20/40 output voltage.

You should try DFU.
 
How the failure appeared?

Do you get voltage at L7290?
Also check U8210/20/40 output voltage.

You should try DFU.



How the failure appeared?
R/ I just got it like that. no signs of life.

L7290 0V

U8240
pin 1 0V
pin2 0v
pin3 0v
pin4 0v
pin5 0v
pin 6 0v
pin 7 0.250
pin 8 0.0
the reason im showing a picture edited with voltages is because on the Board view the ic's have 2 pads less.

im not sure how to DFU
 

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2informaticos

Administrator
Staff member


I said to check output voltage on the 3 mentioned chips; not checking all the pins!
 
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