Goodmans GML22W29HDVF / Vestel 17mb29 main board

[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 

[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 !

[Contrast John]

Hi again
To acess the service mode;
While the set is working press the menu button on the remote control. The normal menu should appear on the screen. While it is displayed press the number keys on the remote control in the order 4 7 2 5. A new menu should appear on the screen. INIT NVM should be at the bottom of the new menu list. Scroll down to it using the scroll keys then scroll right to set it. If you cant get the service mode to appear, or if you still have problems after a reset, you will need a replacement eeprom but as I say spares seem non existant for these models.
Best of luck
John.

[kingkebab100]

Hi John,

managed to get tv to turn on after about 20mins of taking ribbon on/off lol...

even managed to enter service mode and put INIT NVM to yes...

when i switch it off and check service mode again INIT NVM is back on no is this the norm?

just off out now for an hour and leaving it switched on... then ile power down for a couple of hours ...
I will report back and let you know if it turns back on after power down heh heh...

Thanks for everything 

[kingkebab100]

John,

Its buggard lol left it switched off overnite and now no response 'again'

Thanks for help

Ebay it will be going now  :blush:

[Contrast John]

Hi Again
Well you did everything right, but it just wasn`t to be. Hope it earns you a few quid towards a new set.
Regards
John.

[romanko]

Hallo guys. I am just receive the 3 that same TV`s. I tryed this as well. I don`t know yet if this help but is unbelievable. All 3 TV`s have the same problem. stuck in stand-by. did this help you .cheers

[kingkebab100]

John,

Just curious does the TV you repaired still work with that fix??

Rgds

KK100

Romanko... Ive tried 2/3 times now to repair this Model with John's help but I'm afraid its a very short lived fix but worth a shot on your Tv never the less... Good Luck

[romanko]

Guys. I did put TV`s into the service mode and preform but after this fix and remove it from the socket till this morning,the same problem again in all 3 TV`s.I  just can`t understand how TV`s svitched on sometime. When I plug it into the el. and do nothing for a while, TV`s start perfect but not allthetime. If I plug it in and I strait push the channell button coming on after several try.Dont you think, power supply may be bad ? I `v been looking for sam bad capacitor but all look`s good. Any different idea how to fix this crap?   Romanko

[kingkebab100]

Romanko, Im afraid as John says below.. the TV is for the scrapheap..I will be putting mine on ebay tomorrow and will let you know how much it fetches!

best of luck !

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.

[Contrast John]

Hi Guys
Customer hasn`t reported any problems so far. Beginning to think I just got lucky with this repair! Will post an update if theres any news.
Regards
John.

[romanko]

Hi .maybe You right.do You know, which eeprom is this? at this motherboard are two. U690 an top left between power ribbon and HDMI conn. and U698 beside tuner and audio buffer TEA. I am just start two tv`s and they work again .(nightmare) I think we will find out what is this about. Romanko