37" technika lcd37-207 cycling red,green blue

[elviramjw]

I have a 37" technika lcd37-207

Main board is vestel 17mb12-2
PSU is 17pw20-1

all voltages are fine & no bulged caps

How ever, when it powers up it cycles red,green then blue, repeating.
seems like its in some sort of test mode.

Is any one aware of such a test mode and if so how to exit from it.

There is no access to menus or av source selection

any suggestions?

E

[newtothis]

Re: 37" technika lcd37-207 cycling red,green blue

Wait for Tom he loves Vestel sets! LOL

Sounds like a test pattern loop but I certainly haven't seen a test pattern option on any vestel boards before. Most likely a bad Main

[ReeceyBurger123]

Re: 37" technika lcd37-207 cycling red,green blue

Thats a corrupt epprom seen it before, beat Tom to it lol !

[ReeceyBurger123]

Re: 37" technika lcd37-207 cycling red,green blue

The epprom is a little 8 pin o the mobo will look something like this:
You can simplify buy a blank one and install it.

[elviramjw]

Re: 37" technika lcd37-207 cycling red,green blue

thnx for the info
i can probably program one, does any one have the bin/hex file for this model

E

[elviramjw]

Re: 37" technika lcd37-207 cycling red,green blue

r u saying a blank one will make it work i.e. erase it?? - or replace it as it may be faulty?

[ReeceyBurger123]

Re: 37" technika lcd37-207 cycling red,green blue

Literally just a blank epprom of the same type will work on these sets.

[tom66]

Re: 37" technika lcd37-207 cycling red,green blue

Really almost any compatible EEPROM will work, I have borrowed one off a different Vestel set stuck it in, all settings were wrong but did a factory reset and changed the defaults where appropriate (have to set, e.g. the number of HDMI and SCART inputs, type of tuner, type of LCD panel...)

[ReeceyBurger123]

Re: 37" technika lcd37-207 cycling red,green blue

These main board arent actually that bad rearly see them fail apart from epprom and bad start up resistor too bad the psu is a pso.

[elviramjw]

Re: 37" technika lcd37-207 cycling red,green blue

Fixed....

did a bit of googeling after your eeprom comments, procedure was as follows

1. powered up tv and removed eeprom (on socket) as quick as i could, then waited 30 sec.
2. reinserted eeprom (this was the old one) whilst powered up then waited 30 secs.
3. powered down, then up. every thing was OK

did'nt even have to go into service menu to reset av inputs

thnx

guys n gals

Big E

[ReeceyBurger123]

Re: 37" technika lcd37-207 cycling red,green blue

Good stuff also consider recapping the psu, when ever I get these 17pw20's I fully recap the including the poll caps above the transformer, they are ticking time bombs. Here is one I did a few days ago.

[Alastair E]

Re: 37" technika lcd37-207 cycling red,green blue

Ive had a couple of these do this....

Easy way out is turn set on--its flashing through colours--Obtain the correct 'Service-Mode' code for that mainboard, Enter via remote and the 'fault' clears.

No need for messing with EEPROMS.

--Whats all this with those 'Poly' caps by the heatsink then? I must have done several hundred of these--NEVER had any issues with those caps!

Intermittent shut-down is dry-joints on the three diagonal SM resistors--Not those caps....

[ReeceyBurger123]

Re: 37" technika lcd37-207 cycling red,green blue

Ive had a couple of these do this....

Easy way out is turn set on--its flashing through colours--Obtain the correct 'Service-Mode' code for that mainboard, Enter via remote and the 'fault' clears.

No need for messing with EEPROMS.

--Whats all this with those 'Poly' caps by the heatsink then? I must have done several hundred of these--NEVER had any issues with those caps!

Intermittent shut-down is dry-joints on the three diagonal SM resistors--Not those caps....

Basically the early 17pw20 v1 which had the red type of polyls they tended to fail causing lots of issues like intermittent power ect.

[elviramjw]

Re: 37" technika lcd37-207 cycling red,green blue

Ive had a couple of these do this....

Easy way out is turn set on--its flashing through colours--Obtain the correct 'Service-Mode' code for that mainboard, Enter via remote and the 'fault' clears.

No need for messing with EEPROMS.

--Whats all this with those 'Poly' caps by the heatsink then? I must have done several hundred of these--NEVER had any issues with those caps!

Intermittent shut-down is dry-joints on the three diagonal SM resistors--Not those caps....

didnt have remote - but have URC's. will try next time i get one like this

[Techstar]

Re: 37" technika lcd37-207 cycling red,green blue

I have a 37" technika lcd37-207

Main board is vestel 17mb12-2
PSU is 17pw20-1

all voltages are fine & no bulged caps

How ever, when it powers up it cycles red,green then blue, repeating.
seems like its in some sort of test mode.

Is any one aware of such a test mode and if so how to exit from it.

There is no access to menus or av source selection

any suggestions?

E

I had this fault on a goodmans lcd tv , the cure was to press menu on the remote control then 4725 , fault vanished..