Mitsubishi LT-55164 Error 59

[BadCapsTx]

I have a 55" Mitsubishi with the VLP43 Chassis that boots but then flashes 5 Red and 9 Yellow power lights. They is no image on the screen whatsoever nor sound. Per the Service Manual, this indicates a "12VSHORT (Panel-Vcc)" and lists the most likely cause of failure as the "PWB-MAIN" board. This crosses to a "934C374002" per the Parts Quick Reference in the Service Manual.

Rather than replace the board outright (at $160), I wanted to see if anyone has an experience reworking the Main Board in this series of TVs. Unfortunately, the Service Manual doesn't list voltages and test points on the Main Board.

Thanks!
Peter

[dick_barton]

Re: Mitsubishi LT-55164 Error 59

Hello Peter,
Some really sharp picture of the boards (ability to read the component names and numbers) and the overall circuit board layouts would go a long way to receiving assistance.

[BadCapsTx]

Re: Mitsubishi LT-55164 Error 59

Great Idea! Here's the overview and board specific shots on the Main Board. I've also attached the Service Manual for the VLP43+ Chassis.

[CapLeaker]

Re: Mitsubishi LT-55164 Error 59

Look at page 53. There are some regulators on the main board that need to be checked.

[BadCapsTx]

Re: Mitsubishi LT-55164 Error 59

Thanks Caps Leaker.

Unfortunately, I cannot find these Voltage Regulators anywhere on the board. To be clear, there are quite a number of them on the board, just not the ones listed on page 53 of the Service Manual. I've also looked at high resolution photos of replacement boards at ShopJimmy, same result: the Service Manual does not sync with the board...

[dick_barton]

Re: Mitsubishi LT-55164 Error 59

The one capacitor looks as though it may be about to go faulty so would be worth checking.

[Michael Long]

Re: Mitsubishi LT-55164 Error 59

BadCapsTx Not that I can prove it.... EEPROM Failures were prevalent in other Flat Panel TVs built during this era. LG / VIZIO. I have the same LT-55164 and will be replacing the IC5G02 271P367010 IC:AT24C512BN-SH-T. Tried a reset... NO JOY... but at a cost of about $ 1.00 it is worth a try... will report back with my findings.

[Michael Long]

Re: Mitsubishi LT-55164 Error 59

Ooops ! Missed the start of this thread. NOT Error Code 59. Mine is Continually Flashing Green LED. Sorry...