I already found the same board and with the same chip replaced it but still VREG3 still low resistance 1.8k and when injecting 1v the same chip getting hot. any help please
IF i removed that chip and measure resistance on VREG3 PIN 3 short is gone even i inject 1v not taking any amps, but when i put back the chip VREG3 became low resistance and shorted
@mclpslg123 I think the scrapboard i buy is identical to this board i put back the chip try this board that i buy all voltages is present but when pressing power button the power button is getting hot and when i power on with a tweezer pin 123 sparks and turns on then goes off something shorted.I attached the photo maybe this has a chance to solved please help
in the bench lab when i power on with the twezer it turns on sparks then taking amps then goes off the lights slowly and it stays on bench lab 0.125amps
in the bench lab when i power on with the twezer it turns on sparks then taking amps then goes off the lights slowly and it stays on bench lab 0.125amps
On newer dell's , there is only one indicator and it glows once only while turning on or off. Rest of the time it doesnt glows.
I remove the led switch 3pin on the power button board and plugged in back still cannot turn on but when i removed the power button i can turn with tweezer its sparks and tuns on then goes off slowly
I remove the led switch 3pin on the power button board and plugged in back still cannot turn on but when i removed the power button i can turn with tweezer its sparks and tuns on then goes off slowly
As i already said it sparks and glows 'coz you are shorting wrong pins. Voltage on switch present?? If so check RSMRST signal present or not on kbc. This mb uses nuvoton985 as kbc afaik. You can get kbc pins on DELL INSPIRON 15 7437_7537_7737_Wistron_Hadley15_12311-1 schematic which is avlbl.
My only advice to you is first check the basic requirement of KBC. Btw, did you checked resistance on all coils of this scrap board??
@mcplslg123 voltages on the pin 123 are present and has 3.3v the pin4 is the ground , i plugged the screen and turn on by a pin 4 to pin 2 by a tweezer in turns on fine and boots fine but when i plugged in the power button ribbon and board cannot turn on. Already tried jumper two wire to pin 2 and pin 4 to power button board still no luck.
update: i the power button board work plugged in but first i have to make it short with tweezer pin 1 and pin 4 but after plugging out the charger not working again i need to short first pin and pin4 in order the power button board to be work. any help or solution on this please
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