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My lg42pa4500 wont turn on after a power failure

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Obviously there are no error messages, so it isn't a simple failure.
Several reasons:
1. Dead or damaged battery - look for laptop battery error light or replace battery (borrow a working battery to test)
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A battery that will not charge may be as a result of an AC adapter failure, a system board failure, or a battery failure. You should therefore try to troubleshoot the power supply, the System Board and the battery. You can read more through the following site.

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Please read this:

DELL BEEP CODES
Beep Codes Beep Code Description Failure Coverage 1 System Board: BIOS ROM failure System Board, covers BIOS corruption or ROM error 2 Memory No Memory / RAM detected 3 Chipset Error (North and South Bridge Chipset DMA/IMR/ Timer Error for Intel platform); Chipset Error System Board Chipset Failure Time-Of-Day Clock test failure. Gate A20 failure Super I/O chip failure Keyboard controller test failure. 4 RAM Read/Write failure Memory failure 5 RTC Power Fail. CMOS battery failure 6 Video BIOS Test Failure Video card / chip failure 7 CPU Cache Test Failure CPU failure 8 LCD LCD failure

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Once the liquid was spilled it was important to open and do a full clean up on the board. Now it seems there is moisture or shorting in the board due to this which can cause this malfunction.
So it is best to remove the keypad and check on the mother board. Clean the board and dry using a hair dryer. Make sure that the keyboard also is fully dry .
Reset only after the board is fully found to be dry . If the set wont power ON then some damge was done when it was powered the last time due to the spillover shorting.

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1 Answer

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Possible failure of the main power which is a SMPS or the failure of the processor in the main board.
Please check the link for tips on power supply.

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

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Possible failure of the power supply in the TV. This is the SMPS type and so the failure of the driver must be checked. Please find the link below for tips.


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