Hannspree 32 tv no picture or sound but flickering

[Tpricey]

Hello all I am new here and I am having some problems with my tv, thanks for any help given, hope u can help

First of all My tv died and it was the power supply at fault replaced some caps and worked fine for few months, now it turns on and flickers with a black screen
And has no picture at all or sound (sound seems to hum to the flickering) I can't see the menu or change channel, the power light stays soild green when on, I am cape able of soldering and testing if u can tell me what I need to do to find the fault many thanks hope someone can help, it's a hannspree 32" tv the jt01 model

[Mr Bill]

Re: Hannspree 32 tv no picture or sound but flickering

Are the backlights flickering since your not getting a picture (black screen)? What caps did you put in the power supply a few months ago?

[Tpricey]

Re: Hannspree 32 tv no picture or sound but flickering

Yes the backlights started flickering but I had picture within an hour total black screen with flickering which I believe looks like the backlight i tryed it in the dark and cant see anything on the screen, it looks like one of those uv tubes lights with the starter gone, the caps in the power supply I can't remember what brand I used but I can rip the back off for you and check them,

[Tpricey]

Re: Hannspree 32 tv no picture or sound but flickering

Just checked no brands but test out ok, and no caps gone

[Tpricey]

Re: Hannspree 32 tv no picture or sound but flickering

Just replaced a bad cap on the main board, have picture now and sound but still have flickering inverter board gone do u recon?

[budm]

Re: Hannspree 32 tv no picture or sound but flickering

Did you replace at aleast ALL the caps in the secondary side of the power supply? Bad cap can look normal but can have high ESR.
Lat week I fixed 26" Insigia with flickering backlights due to bad main cap which does not fail too often, in this case, the capacitance is OK but the ESR is at 1.2 Ohms.
http://s807.photobucket.com/albums/y...t=DSC01114.jpg
It may not be the cause in your TV but worth to check.

[Tpricey]

Re: Hannspree 32 tv no picture or sound but flickering

I replace 10 caps on the p/s and 4 on the main board so I just bought an inverter, which should be here next week no caps look like yours that looks bad almost water damage, what should each cap read at in volts and oms?

[Tpricey]

Re: Hannspree 32 tv no picture or sound but flickering

Wen the tv is off

[budm]

Re: Hannspree 32 tv no picture or sound but flickering

You need ESR meter to read the Equivalent Series Resistance of the cap.
That picture of the cap was not water damaged, I was trying to remove the sticker on it, the cap was not leaking liquid, it juat has high enough ESR the filter out the AC properly.

[Tpricey]

Re: Hannspree 32 tv no picture or sound but flickering

So I can't do it with a mulit meter?

[gilly1984]

Re: Hannspree 32 tv no picture or sound but flickering

So I can't do it with a mulit meter?

No. Esr tester needed.

[budm]

Re: Hannspree 32 tv no picture or sound but flickering

I jump another cap in parallel with it to see if the flicker goes away, then I verify with cap meter for the capacitance and ESR reading.