Goodmans 42" Plasma standby to green but no pic - help me!!

[shepp]

Goodmans 42" NR GTV42P PLASMA

my first plasma ive got in, doesnt come on, red standby light goes to green but nothing happens then theres a little red LED on the power board that comes on when out of standby and also a green one thats on all the time near where the 240v plugs in, i have no idea where to start, ive tried to check voltages at the plugs but there is none?? not 100% how these work, but i am willing to buy new board if i new which board to buy or test i will post pics later as i have to pop out

[tom66]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

It's just an 852x480 plasma; how much did you pay for it? This chassis is made by Beko, and I think it uses LG PDP parts. Post pictures!

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

its just took me 45mins to get these pics available for upload!! stupid phone!

the green lights are when tv is switched on, then i hear a relay click then the red light on the far left of the board comes on (power board)

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

It's just an 852x480 plasma; how much did you pay for it? This chassis is made by Beko, and I think it uses LG PDP parts. Post pictures!

paid £18 so not too bad

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

R8010 is blown ceramic fuse, but just trying to see whats caused it.....any ideas guys?

i cant find Q8016 and Q8018 any one point me in the right place??

[tom66]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

Okay, Samsung PDP.

You'll have to point out the fuse for us.

If the fuse is blown on either sustain board, I would normally consider it an expensive repair. It may simply be the fuse ageing, but it is more likely a failure on the board in some way.

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

on the power board to the left are 2 white ceramic fuses far left, its not letting me upload the edited photo, its the one on the left thats gone, there is a repair kit that contains these and 2 big transistors, but i cant find the transistors on the board? ill up load a closer pic after ive eaten my diner

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

on the power board to the left are 2 white ceramic fuses far left, its not letting me upload the edited photo, its the one on the left thats gone, there is a repair kit that contains these and 2 big transistors, but i cant find the transistors on the board? ill up load a closer pic after ive eaten my diner

found them..... tested and there both ok, so im thinking maybe its just the ceramic thats gone....fingers crossed, if anyones got any other ideas of what to check before i order them it would be helpful


its R8010 thats blown, which is the ceramic on the left of the first pic

[tom66]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

Common failure - seen it fail on Hitachi PDP's too.

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

Common failure - seen it fail on Hitachi PDP's too.

Do you think any thing else will need changing? will be a good buy if that's all it needs

[tom66]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

Should only be those resistors but could be a shorted fet on PSU.

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

Should only be those resistors but could be a shorted fet on PSU.

I'll let you know when I've fitted it. Thanks again tom

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

fitted resistors just now, and 3 green lights on the board come on then relay clicks and the red light comes on and the 3rd green led goes out, are all the voltages on these DC i mean the feeds to the other boards?

its as if its waiting for a signal for something then when it doesnt recieve it its clicking off, the green light on the front of the tv stays on green though

[tom66]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

Check for 170-210V Vs and 50-70V Va.

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

DC or AC ?

[tom66]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

Dc

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

right.... im getting 5v on D5VL,
15v on Vcc
4v on Vs
and on Va it shoots up fast but then drops down again probably because of Vs voltage not present

what should i check next?

[tom66]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

Try testing Vs and Va without Y and Z sustains connected.

Vs and Va are independent supplies; they shouldn't influence each other.

[shepp]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

Try testing Vs and Va without Y and Z sustains connected.

Vs and Va are independent supplies; they shouldn't influence each other.

done that and they do the same, i have noticed that one of the bigger caps 250V 1000uf looks swelled compared to the other 3 that are on the board, the tops are flat on the others

i have just been through all the diodes and transistors and they are all ok

[tom66]

Re: Goodmans 42" Plasma standby to green but no pic - help me!!

If you can press the bulging disc down, the cap is okay. The plastic disc will sometimes bulge without the cap failing. Right now I would replace the startup cap for the Vs.