Samsung LE32C450 - No Screen - Has Backlight - Has Sound

[st33n]

Hi all,

I have a Samsung LE32C450 which has a black/dark screen. The sound works (has a startup sound), and the backlight appears to be working.

I have checked for visible damages on capacitators, but cannot see any visible damages or leaks.

Any tips on what to check? I am quite new in the electronics field, but have repaired a tv before, and know how to solder.

Thanks!

[budm]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Please post good claer pictures of the back of the TV so we can see how all the boards are hooked. You may have dead T-CON board.

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Cant seem to edit my first post, so here are the images.

[budm]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

This TV has the integrated T-CON board LCD panel assembly which will be real hard to troubleshoot the T-CON. For now you can see if the T-CON is getting the DC voltage feeding it. On the first picture of the flat white ribbon cable, the first pin on the top of the connector should have DC voltage on it, it should be either 5V or 12V. Black probe of the meter will be on the metal chasis of the TV, be real careful not to slip the probe. Also take the voltage reading on the last pin on the bottom.

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

This TV has the integrated T-CON board LCD panel assembly which will be real hard to troubleshoot the T-CON. For now you can see if the T-CON is getting the DC voltage feeding it. On the first picture of the flat white ribbon cable, the first pin on the top of the connector should have DC voltage on it, it should be either 5V or 12V. Black probe of the meter will be on the metal chasis of the TV, be real careful not to slip the probe. Also take the voltage reading on the last pin on the bottom.

Thank you. I will take the measurements tomorrow. I was thinking that maybe the fuse is blown?

[budm]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

There is fuse on the T-CON board but you will have top remove the screen to get access to the T-CON assembly, this is the low end SAMSUNG TV.

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Aah ok. And I thought #2 was the T-con board =)

[budm]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Picture number 2, 4, 5, 6 ,7 are the picture of the backlights inverter board.

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

i checked, it is getting 12v, so that should be ok. I also can see the f1 fuse, and might be able to troubleshoot that.

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Any tips on how to check the fuse? I am seeing multiple ideas on that on the forums.

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Anyone else have a tip?

[vinceroger69]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

can you get to the fuse easy if so muti meter on dc volts black probe on metal chasis of the TV and put red lead on 1 side of fuse note voltage then put red probe on the otherside of the fuse note voltage.

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Thanks, Both sides are giving 12.16v.

[vinceroger69]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

so fuse is good just recheck the board it may have 2 fuses not sure?

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Yea the board is hidden, and i dont think i can remove it.. Seems a lost cause

[vinceroger69]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

in budm post 4 he asked for you to test 2 voltage readings was they both tested?

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Yes it was 12v

[vinceroger69]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

maybe wait and see if budm tom66 etc can advise a bit more i have never worked on these combined screen tcon types before and i am still quite new to lcd tv repair myself but getting better with practice i just need more sets to pratice on though.

[budm]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

You will have to remove the screen from the chassis to remove the metal cover that runs along the length of the bottom side of the LCD panel assembly. Onec you have it open, you will not be able to power it up to do any voltage test because the flat cable will not reach the main board any more. This may be the lost cause for this TV.

[st33n]

Re: Samsung LE32C450 - No Screen - Has Backlight - Has Sound

Thanks, TV has been given up on. Thanks again for all the tips.