Display problem LA-7902P

A1yn88

Senior Member

Join Date: Mar 2014

Posts: 112

Country: Romania
#1

Display problem LA-7902P

07-30-2020, 02:08 AM

Hello.
I have a problem with a LA-7902P motherboard. It does not display anything on the internal display, only on the external display via HDMI. I reballed to PCH because I miss ENVDD_PCH, the same result.
Can anyone tell me what volts I should have on LCD_VCC_TEST_EN and ENVDD_PHC to know when it works properly and if ENVDD_PHC is missing should the chip be changed?

Thank you.
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Shrimp_Green

New Member

Join Date: Sep 2018

Posts: 8

Country: Brasil
#2

07-30-2020, 11:24 AM

Re: Display problem LA-7902P

Hello, greetings from Brazil.

The ENVDD_PHC signal must be 3v.

The LCD_VCC_TEST_EN signal is for you to inject 3v (to diagnose the defect).
I'll leave a picture of the correct voltage:

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Last edited by SMDFlea; 07-31-2020, 02:49 AM.
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Display problem LA-7902P

Display problem LA-7902P

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