Hyundai HU-LCD1902F 19" TV - blue screen

[matthmal]

Hi,

I have a Hyundai HU-LCD1902F 19" TV which whenever I connect a source to this TV it will remain just a clear blue display.

I have tried to look physically for bad caps but everything seems fine to me.

Hope that someone can help me.

Thanks.

[tom66]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

Could be a voltage regulator problem. Test as indicated in this thread:
https://www.badcaps.net/forum/showthread.php?p=274391

[matthmal]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

Voltage Regulator Test 1:

Model:
SE8117T25
0518-LF

Results:
Pin 1 -> ranging 0.03
Pin 2 -> ranging 0.03
Pin 3-> ranging 0.03

Voltage Regulator Test 2:

Model:
EH16A
729J55

Results:
Pin 1 -> ranging 0.02
Pin 2 -> ranging 0.02
Pin 3-> ranging 0.02

[tom66]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

Hmm, no regulators are receiving power. Did you definitely use the DC20V range of your meter? Probe in Volt/Ohm and in COM? Is the COM probe (black) grounded to the metal frame? (back of LCD is good place.)

[matthmal]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

yes i;m sure about that as im also troubleshooting some monitors...

[tom66]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

Is the sound present?
I suspect a problem with that large IC in the centre... which might be difficult to get a replacement for.

[selldoor]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

Is the sound present?
I suspect a problem with that large IC in the centre... which might be difficult to get a replacement for.

I looked at that, the soldering looks a bit odd - you could try slight pressure on it to see if anything changes on screen perhaps try heating gently with a hairdrier and see if that changes anything.

[matthmal]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

ok so i did what you did and the problem persisted. I noticed that the large IC is lifted from one side as if someone removed it and tried to re-solder it again and did not put it back in the exact position.

[tom66]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

That could definitely be a problem!
Has anyone worked on this unit beforehand?

[matthmal]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

i don't think that removing it and re-installing it could solve the problem right? just to point out something, i noticed that if it stays on a blue screen for long while navigating with the source it automatically turns off

[tom66]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

It might be shutting down because no signal has been detected.

If the chip truly has loose pins, it is unlikely to work.

[matthmal]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

That could definitely be a problem!
Has anyone worked on this unit beforehand?

i dont know if someone has worked on it before because it wasn't mine. so do you suggest that i try to re-solder it?

[matthmal]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

help me please guys

[tom66]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

Sorry missed the post. The best bet would be to solder it, if you are capable, or source a new main board -- might not be worth it for a 19".

[matthmal]

Re: Hyundai HU-LCD1902F 19" TV - blue screen

ok will try to de-solder and solder it again tomorrow and let you know