*Please help* GRUNDIG GULCD37HDIT wont turn on

[simple-me]

Someone please help, my Grundig GULCD37HDIT wont turn on and is stuck in the standby light.

[tom66]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

Done ANY diagnosis of fault?
Did it occur suddenly?
No audio, no back light? (screen glow slightly)
Skills / abilities -- do you have a multimeter (digital one?)
Screwdriver to take it apart
Camera to get pics?

[multimeter]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

post up some pics of power supply using manage attachments.

what have you checked so far?

[simple-me]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

Thanks for the reply guys, my skills are limited to electronics im afraid and I don't have a multimeter. I may be able to source one from a friend at work if I can. I have taken the back cover off and it has a PLCD 190 PT3 power board or power supply board.

The screen remains black when switched on.

The tv is responds to the remote and the standby button on the side by the standby light going from a bright red to a dim red. That's the only response from it.

I'll try getting pics on here but please bear with me Im not entirely sure how to do that.

Thanks

[simple-me]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

Pictures of the boards inside the tv

[multimeter]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

refer to post #2 before you carry on

[simple-me]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

Done ANY diagnosis of fault?
Ive not done any diagnosis of the fault. I'm not sure where to start really. I've checked the psu board and can't see any bad caps.?

Did it occur suddenly? Yes it did
No audio, no back light? (screen glow slightly) No audio and back light...I can't see a glow on the screen, maybe if turned the lights off to be sure??
Skills / abilities -- limited but can try I understand a little
do you have a multimeter (digital one?) I'll try sourcing one from a friend at work.

[simple-me]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

Done ANY diagnosis of fault?
Did it occur suddenly?
No audio, no back light? (screen glow slightly)
Skills / abilities -- do you have a multimeter (digital one?)
Screwdriver to take it apart
Camera to get pics?

The only diagnostics I have done is take voltages with a meter. there is no audio or back light no screen glow.

When I turn the tv on its in auto in standby. I get 11.5v on 3 pins and on 2 of them voltage doesnt stay up. I also get 25.5v in 2 places (+12vL) and these also don't stay up. The only voltage to stay up is the +5vstby which shows a constant 11.5v.

when I press the stby button on the remote I get a constant 25.5v in the +12vL pins. I also get a constant 11.5v at the 5vstby pins.

hope this makes sense. I have a picture showing all the voltages...on left when on stby, on right when stby pressed on from remote.

Thanks

[tom66]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

Set your meter to DC not AC. Also check the battery is fresh, those readings are much too high.

[simple-me]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

Set your meter to DC not AC. Also check the battery is fresh, those readings are much too high.

Apologies...

voltages with stby off

[tom66]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

PSU voltages look OK, so it's probably a main board fault.

[simple-me]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

PSU voltages look OK, so it's probably a main board fault.

Is that bad??!!

Fixable?

[vinceroger69]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

pictures of the main board also the part number from it including any numbers on stickers on it.

[simple-me]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

pictures of the main board also the part number from it including any numbers on stickers on it.

picture of main board and model/chasis number

[selldoor]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

voltages when on? can you find any fuses other than the mains one
may be labelled F*** but may look nothing like a mains fuse - can be square box
upright barrel, torpedo , and all colours

[multimeter]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

check ps_on signal at mainboard end,keep meter connected to this pin,and power up tv,does it rise and stay,or just drop off?

[simple-me]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

voltages when on? can you find any fuses other than the mains one
may be labelled F*** but may look nothing like a mains fuse - can be square box
upright barrel, torpedo , and all colours

The only3 voltages coming up when turned on are where the 5.6v were showing. I get 5.6v at the +5vstby pin, the other 2 are showing 0.33v.

I cant find a fuse on the main board similar to how you mentioned, maybe Im looking in the wrong place??

[multimeter]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

The only3 voltages coming up when turned on are where the 5.6v were showing. I get 5.6v at the +5vstby pin, the other 2 are showing 0.33v.

I cant find a fuse on the main board similar to how you mentioned, maybe Im looking in the wrong place??

check around the connectors,it will be a SMD on a mainboard

disconnect main board,jumper across 5v_stby to ps_on,do all other voltages turn up?,use a resistor to limit current,not sure if you have done this test with mainboard gone

[simple-me]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

check ps_on signal at mainboard end,keep meter connected to this pin,and power up tv,does it rise and stay,or just drop off?

Forgive me for Multimeter...but where will the ps_on pin be?? Im sorry...

[multimeter]

Re: *Please help* GRUNDIG GULCD37HDIT wont turn on

thats ok dude,the pins to join are +5vstb and the one marked stby,but no mainboard connected,just want to confirm psu is actually working ,sorry its an ocd thing