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Old 12-01-2017, 01:03 PM   #1
Join Date: Oct 2014
City & State: Nasice
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Default Samsung RV509 black screen, wont boot always

Hi guys, I have a problem with friends laptop, board is BA41-01433B with i3 processor. Firstly the DC jack was getting hot (bad solder joint), now the laptop doesn't show picture every time it's turned on...
Anyhow, when it boots all voltages are ok, 19V, 3.3V etc, but when it fail boots
the voltages on the coils near processor are 0.3 -0.4 V less than it should be. Nothing seems shorted to the GND or looks wrong.

Normal boot: 1.0V
Fail boot: 0.6 -0.7 V

Did anyone had similar problems like this, I dont have a spare CPU to test it, but i see the infamous NEC Tokien capacitor on the under side of CPU socket

6ot4hr is offline   Reply With Quote
Old 12-02-2017, 01:49 AM   #2
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Default Re: Samsung RV509 black screen, wont boot always

Replace nec tokin with 4x 330uF tantalum capacitor first. Hopefully problem will be solved.
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