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Goodmans GML22W29HDVF / Vestel 17mb29 main board

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Contrast John:
Hi All
Had one of these sets in for repair stuck in standby and resisting all attempts to start it up. Found (more by good luck then judgement) that if I disconnected the ribbon cable from the main board, that the set would start ok. Tried the cable in and out a few times to prove it wasn`t just a coincidence and then while the cable was out started the set, went into service mode (menu 4725) and performed INIT NVM. Reconnected the cable and found I`d cured the problem. Clearly a case of data corruption, presumably in this instance between the main and dvb panel. Don`t suppose it`ll work every time one of these sets is stuck in standby but definately worth a try. Anyone else come across this?
Have attached manual for 17mb29 but note that that the standby switching voltage (pin1 of PL807) was found to be 1.5v in standby and 0v when working.
Regards
John.

kingkebab100:
John, I have joined here today just to say your a star.. and above fix worked perfect..

Thank you very much  :1st:

kingkebab100:
John,
Im having probs again :(   all I did last time was remove ribbon cable and put it back and it worked a treat,,

Im no repair man so i tried pressing menu 4725 but nothing happens any chance you can talk me through it to preform INIT NVM as you say??

Thanks

Contrast John:
Hi kingkebab100
Dissapointed to hear that you`re still having trouble.
Sounds like your eeprom IC is faulty and has lost its settings again, probably along with a few more. Without the set running its not possible to perform a reset. Replacing or reprogramming the eeprom IC is the only answer (apart from a new signals board).
Duff eeproms are the scourge of modern tv sets and with not much available in terms of spares or technical support many sets are forced onto the scrapheap for want of an IC that would make for a simple and economic repair.
Sorry to be the bearer of bad news and if anyone knows a scource of spares for these models I`d be interested to know.
Regards
John.

kingkebab100:
Thanks for your reply John,

I can get set running by taking ribbon on/off board a couple of times and the remote will turn on..
TV will then work on/off for time span of last power up of 2-3hrs.
But leave powered off for any longer and it will not switch back on :(

I just cant seem to get into service mode and preform
INIT NVM ....

if i am able to get into service mode how do i preform above task(s)

Thanks again !

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