After i spend some time reading the schematic better i realized that PQ31 is the one in red circle at the attached photo below.
I am definitely 100% sure because pin number 4 of PU7 is connected with PQ31 pin number 2(GND) at schematic page 41
Does anyone know what non surface mount component to use for replacement ?
I have fast access to many components but not smd and don't want to order it and wait a week or more
i have the same problem (only jack light on , no power up , changed button and ribbon with no luck) , but the diodes seem ok.
BUT on the other side of these diodes the pcb gets hot , i guess is the square IC on the other side.
i also hear some tic-tic noise when i bring my ear VERY close to the pcb..
After i spend some time reading the schematic better i realized that PQ31 is the one in red circle at the attached photo below.
I am definitely 100% sure because pin number 4 of PU7 is connected with PQ31 pin number 2(GND) at schematic page 41
It had no +3.3V_ALWP and no +5V_ALWP. These rails are ok now afer replacing PU10, ISL6236I.
Both 32khz oscillators are running and the BIOS SPI is active but there is no other life signs.
No LEDs are lit and no response at all to the power button. SWI#1 does pull low when the power button is pressed.
I dont know which pin states on the EC are important for the power LED to light.
i have the same problem (only jack light on , no power up , changed button and ribbon with no luck) , but the diodes seem ok.
BUT on the other side of these diodes the pcb gets hot , i guess is the square IC on the other side.
i also hear some tic-tic noise when i bring my ear VERY close to the pcb..
any ideas?
thank you
The tic-tic noise usually means that one of the Point Of Load buck regulators is trying to start with a short on its output.
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