led green red green red
no trigger where should i watch
no trigger where should i watch
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Re: samsung NP300E5
See attached.
Connect the power adapter. Meter in DC volts (20V or higher is ok).
Carefully, measure the voltage to ground of each test point on the charger IC.
The charger IC is U509 - see attached.
Interested in the voltage readings for:
ACN
ACP
REGN
ACDRV
VCC
Post each measurement.Attached FilesLast edited by mon2; 03-31-2023, 10:25 AM. -
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Re: samsung NP300E5
What program should I open it with?
BoardViewer 2.1.0.8-
it didn't work expertAttached FilesComment
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Re: samsung NP300E5
Try the attached.Comment
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Re: samsung NP300E5
ACN 18.5
ACP 18.5
REGN 6.0
ACDRV 24.5
VCC 18.5
these are expertsComment
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Re: samsung NP300E5
These are good values for these pins.
With the adapter connected, check the voltage to ground of each coil (inductor) on the logic board.
You are checking for any low voltage measurements on the coil to ground. Each coil is linked to a local buck switching regulator. If the coil is with a low or zero voltage, that power rail could be defective or disabled due to a shorted part. A shorted part will consume too much current and the regulator will sense this fault and turn off the regulator.
Otherwise, you need to review the BIOS devices on the logic board which may be corrupt.Comment
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Re: samsung NP300E5
I solved the problem master
bios yazdım düzeldi
thank you for your interestComment
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Re: samsung NP300E5
I solved the problem master
bios yazdım düzeldi
thank you for your interestComment
Comment