technika 42-2030

[sordids999]

Re: technika 42-2030

ah it seems you have to leave it off for 5 mins then the backlight come on
me and panels dont get on i think

[tom66]

Re: technika 42-2030

So you get picture with one ribbon out?

[sordids999]

Re: technika 42-2030

Strange both ribbons out and LVDS cable disconnected now the backlights won't boot up just orange and blue flashing standby light

[tom66]

Re: technika 42-2030

Hmm, looks like the short may have damaged the main board. What is the 17MBxx part #?

[sordids999]

Re: technika 42-2030

17mb38-1 290110

[sordids999]

Re: technika 42-2030

Ok tom both ribbons connected and back light fine if I connect the LVDS cable then it flashes orange and blue

[sordids999]

Re: technika 42-2030

Ok maybe not

[tom66]

Re: technika 42-2030

Are you saying the fault is intermittent?

[sordids999]

Re: technika 42-2030

Seems to be mate one minute the back light turns on then another time its a orange and blue flashing standby

[tom66]

Re: technika 42-2030

Hmm have you tried checking if the 12V from the PSU is steady? Maybe you have a low power supply voltage which is being loaded by the panel (but not a fault, it's normal.)

[sordids999]

Re: technika 42-2030

If u go back to page one tom I done a psu reading but your have to click to open it up

[sordids999]

Re: technika 42-2030

So you still think panel fault tom ?

[tom66]

Re: technika 42-2030

Your PSU is working; I did not see that initially.

Tis an odd one, if you have 12V both ends of fuse, I am thinking something is up, somehow, with the panel. Could be a bad T-con, but it seems unlikely right now.

If you are willing to dive in, you might find a shorted ceramic capacitor along the panel boards.

Still trying to figure out why it does not work with one ribbon out - have you tried with either one removed?

[sordids999]

Re: technika 42-2030

I've tried removing one ribbon at a time still not working The strange bit is that I've put both ribbons back in and it's still flashing blue and orange standby it seems I have to wait a while for it to work again
I'll see if I can get the screen out and check the panel boards

[stj]

Re: technika 42-2030

tesco shit,
if you have only 12v going into the main board,
and it generates the 5v & 3.3v onboard,
find some place to meter the 5v & 3.3v

then check what voltage you get in standby, and when on - with and without the lcd panel connected.

i'v got one here that a 23inch version,
there is a common problem with the 5v switching regulator breaking down under load as it warms up on the smaller ones with a msd306 board.

[tom66]

Re: technika 42-2030

Agreed it is Tesco shit but it does come in two flavours "China made" and "Vestel".
Both are pretty bad, but at least the Vestel stuff you can get schematics for, more or less.
This is a Vestel set. MSD306 is Top Victory Electronics junk..

The 12V, 5V & 3.3V are all generated by the PSU.

[sordids999]

Re: technika 42-2030

Ok tom I've stripped the panel out do I need to check these tiny caps ?

[tom66]

Re: technika 42-2030

Just stick your meter across them, any on low ohms are suspect (<200), so note them down.

[stj]

Re: technika 42-2030

MSD306 is Top Victory Electronics junk..

made a note of that,
do you know a code to get a service menu?

[tom66]

Re: technika 42-2030

SOURCE 3690 or SOURCE 2580 are the only ones I'm aware of.