Baird TE-40LED AL no standby light

[quiggy]

Hey guys! Been a while since I last posted, I decided to take some time away from attempting to repair TV's. But, I couldn't stay away and here I am.

Now I've had myself a Baird TV donated which I was told came on after a while but turned itself off 5 minutes later. I assumed caps when they told me but when I got it, I had no life at all, not even a standby light.

I thought it could have been the PSU but I checked standby and it came back at 5.06v so does that lead me to perhaps the AV board? since the standby light isn't coming on.

Is there anything else that could be causing this? or what should I check?

I'll upload pictures shortly

Thanks!

[ammarben]

Re: Baird TE-40LED AL no standby light

if the standby light isn't coming on so that lead perhaps the main board is faulty

[quiggy]

Re: Baird TE-40LED AL no standby light

That's what I thought, since the 5v is there for standby but there is no light. Do you know of anything else to check to be sure?

[ammarben]

Re: Baird TE-40LED AL no standby light

try to start the power supply whithout the main bord
jump ps_on to 5v with 1k resistor if all voltages came on

[ammarben]

Re: Baird TE-40LED AL no standby light

post model of PSU

[sordids999]

Re: Baird TE-40LED AL no standby light

Does it use the main board T.MSD306.9A ?
could be the eeprom

[ammarben]

Re: Baird TE-40LED AL no standby light

it is not a symptom of an eeprom
wait for an other answer from tom and budm

[quiggy]

Re: Baird TE-40LED AL no standby light

I can't find a make of the psu looks like vestel one that I've seen before. I've added a picture of the psu and the main av board too

[ammarben]

Re: Baird TE-40LED AL no standby light

model bsfp4120-001a

[zomi]

Re: Baird TE-40LED AL no standby light

On the power board have you checked the diodes
And resistors
Also check the big caps to see if they have any residual voltage before proceeding to check the components..

[quiggy]

Re: Baird TE-40LED AL no standby light

The big resistor at the top of the psu I can't seem to get a reading from. Would this cause the fault? I wasn't sure how to read this resistor, the green band at the end kept throwing me off, but the only way I could make sense of it was to ignore the green band and it would make it a 0.1ohm resistor? it does measure at 0.3ohm but I'm not sure I've tested it correctly.

All the diodes appear fine.

[quiggy]

Re: Baird TE-40LED AL no standby light

Anyone any ideas?

[quiggy]

Re: Baird TE-40LED AL no standby light

I'll go ahead and order the main av board and see what happens.

[quiggy]

Re: Baird TE-40LED AL no standby light

It wasn't the main board.

[Agent24]

Re: Baird TE-40LED AL no standby light

Check for shorted\stuck buttons on front panel

[quiggy]

Re: Baird TE-40LED AL no standby light

The buttons were fine, it turned out to be the PSU which I found strange because even though there wasn't enough power to fire up the tv, the 5v was there and surely that would have been enough to turn on an led?

Confusing, oh well it's good to go now anyway.

[Agent24]

Re: Baird TE-40LED AL no standby light

That is rather odd indeed, unless there is more to it than just presence of 5v for the LED to work, like some power-good status line from the PSU as well?

[matyka]

Hi, did you manage to get it fixed? I have the same problem here.

[vinceroger69]

Re: Baird TE-40LED AL no standby light

Hi, did you manage to get it fixed? I have the same problem here.

Have you checked any voltages on your psu to see if any are missing? ive just read the thread and a replacement psu fixed the issue in this persons tv but dose not mean you have the same fault though there are some cheap psu s online if it is at fault,or if you cant find the fault.

https://spares2repair.co.uk/baird-te...1a#prettyPhoto

[matyka]

Re: Baird TE-40LED AL no standby light

Hi, and thanks for the reply. I just fixed the psu, I only had 4.5v that was the only reading from the power supply.
The fix is very simple in my case, cold solder around the big transformer.