Hello friends .
I've got this lap la-d707p motherboard (With GPU) that is not starting. I have no power/charging LED on the connector when plugging the power charger.
I tested PQ202 and PQ203 the first 2 mosfet but i got only 19v at the drain of PQ202...
no short to GND at all coils , pq202 / pq 203 are not shorted.
Consumption is 0 amp. Gate of PQ 202 = 0v
BQ2472A requirements :
pin 20 vcc = 19v ok
pin 6 acdet =2.6v ok
pin 16 regn = 6v ok
pin 5 acok = 0v !! must be 3v
no 3vl at pr214 , no 3vl at pu2.
Troubleshooting :
i desolder pq203 , i got 24v at gate of pq202 , inject 19v at the pq203 ( non soldered) i got my 3vl ; acok = 3v...power on the lab work .
i changed pq 203 still same behaviour...what i must verify too !
thank you
I've got this lap la-d707p motherboard (With GPU) that is not starting. I have no power/charging LED on the connector when plugging the power charger.
I tested PQ202 and PQ203 the first 2 mosfet but i got only 19v at the drain of PQ202...
no short to GND at all coils , pq202 / pq 203 are not shorted.
Consumption is 0 amp. Gate of PQ 202 = 0v
BQ2472A requirements :
pin 20 vcc = 19v ok
pin 6 acdet =2.6v ok
pin 16 regn = 6v ok
pin 5 acok = 0v !! must be 3v
no 3vl at pr214 , no 3vl at pu2.
Troubleshooting :
i desolder pq203 , i got 24v at gate of pq202 , inject 19v at the pq203 ( non soldered) i got my 3vl ; acok = 3v...power on the lab work .
i changed pq 203 still same behaviour...what i must verify too !
thank you
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