Haier 55E3500c Service Manual page 48

3. Other problem
 Mainboardnot work

1.check if the power supply have 12V and 5V output.
2.Verify if the DC/DC convertors have the right output (3.3V,1.8V,1.2V).

3.Verify if the Mainchip(MSD6306PUS), DDR2, AudioAMP...solder well;

 4.Verify if the FLASH(U18) has the right software and work well;
5.Verify if the Y1(Crystal) has the right frequency

 Panel not work
1. check if the voltage input and output of blacklight power is working normally.

2.Verify if the Mainboard output the right On/Off signal to power board.

3.Verify if the Mainboard output the LVDS singalto panel T-con board.

4.Verify if the software is the right version of this model.

5.Change the LVDS wire to check if it's broken.

Power board not work

 1.Verify if the power cord connect well?
2.check if the power supply if working normally ; check if the power supply of

+5Vstandby is working normally;
3. check if the POWER ON/OFF voltage is high pressure;

 4.check if the power supply have +12V/+5V output;
5.Check if Main board / LVDS wire / Panel are in good condition ?

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