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Wharfedale LT26K1CB LCD TV    
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Joined: 04 Mar 2012
Posts: 13

PostPosted: Sun Mar 04, 2012 4:22 pm    Post subject: Wharfedale LT26K1CB LCD TV Reply with quote

This set uses the MSD109CL-V400 main board. Stuck on blue LED no activity, no back light.

The inverter and back lights are OK when applying an 'ON' voltage to the relevant plug, also the power supply is stuck in the 'ON' mode, obviously a main board fault, because I can manually switch the main power supply OFF and ON by applying a couple of volts to it's 'Power ON' terminal.

All the usual voltages appears to be OK from the power supply and from the on-board individual dc-dc converters, the re set appears to be generating a re set voltage for pin 131 of the micro controller chip.

No bulging or leaking caps that I can see, I did change some in the PSU just to be sure, using 105deg, low ESR types of course.

Anyone any clues as to the cause of this, it does seem to be a problem with these boards.... I don't want to cast 'evil eyes' on the CPU just yet!

Thanks, Dave

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