820-00034-A 2 led on, fan on, no chime/screen

yair37

Member
PLT_RESET_L 0V

suddenly when i was connect the power cable i was get 3 led light(no screen connected) and there was chime sound and PLT_RESET_L 3.3v but after i was pull the power cable out and connect again it back to 2 led light and PLT_RESET_L 0V i was try again many time but still 2 led light..
 

yair37

Member
update:
after few more BGA shacking and ultra sonic cleaning..
no indicator light.
PP12V_S5,PP12V_G3H -11.5v
PP5V_S5 -5v
PP3V_S5 - 0v
PP1V05_S0 -0V
 

yair37

Member
U7600:
17-REG_VIN_U7600 11.6V
18- PP5V_S5 5V
4-REG_VCC2_U7600 5V
5-REG_VCC1_U7600 5V
24-PM_EN_REG_P5V_S4_R 0V
 

yair37

Member
O.K i was disable the short, replaced the caps that short but still no PP3V3_S5 on L7610 diode mode now 140
 
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