User Profile

ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

02-20-2013, 03:30 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

So... TV is fixed! Decided to try a replacement main/AV board and it worked! Sadly, it came after we hard bought a new TV in desperation but now we have to 40" TV's... one for each eye makes it 3D right?

Anyway, so much for the "TV engineer report" saying it was T-Con. Nothing wrong with it.

Big thanks to the help I received here, but I should also plug [url]http://flattvparts.co.uk[/url] who were very helpful and supplied me both T-Con and Mainboard.Re: Samsung LE40C580 no sound/picture,

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-21-2013, 12:51 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

Thanks for the quick reply! Seems that datasheet link is to the picture I took of the T-Con board?

Agree with T-Con not being prime suspect, since I've tried a replacement board. But I guess that could also be faulty!

I'll check the voltages and come back. Are all these CD components on the TCon board? And to check, I test against +ve using the fuse, and for ground the cable connector chassis, right?

Thanks very much.

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-21-2013, 11:57 AM
Re: Samsung LE40C580 no sound/picture, but backlight on

Does the voltage mean it's good/bad? Anything else I should try?

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-14-2013, 02:25 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

OK I've just tested the voltage and luckily for me there were no blue flashes or green smoke. I tested the voltage on the yellow caps one each leg and it was 0V (but it's been off a few days).

So... I got a reading of 12.42V on the TCon fuse/chassis test (for both TCon boards I have). Both PSU fuses are fine, I took the one out that you mentioned to test. The voltage on the TCon fuse was the same before and after the backlight came on (which is does after about 7 seconds of being connected to the power, without...

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-13-2013, 04:29 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

Thanks selldoor - this makes sense. I'll look into this tomorrow and come back to you (or not, if I zap myself with 100μF of finest distilled lightning bolt).

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-13-2013, 03:46 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

Thanks, I'll try this.

With regard to checking those PSU fuses, do I need to discharge those yellow 450V caps or just be very careful? If I do need to, use something like this? [url]http://lifehacker.com/5935955/diy-capacitor-discharge-tool[/url]

Cheers for help with this!Re: Samsung LE40C580 no sound/pictur...? If I do need

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-13-2013, 02:18 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

It was about 18 months, but that was nearly 6 months ago. Been disputing with retailer since it went wrong and without a telly since then!

I could probably measure the voltage in standby, but not when it's working since it doesn't ever get into a state I could call working (it seems to power on the backlight without pressing any buttons). What would I be looking for?

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-13-2013, 02:04 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

I'm guess due to lack of responses that we're at a bit of a blank with this one. Does anyone have any suggestions what to do next? Professional repair, landfill or wait for retailer to repair I guess?

Thanks for everyone's efforts.

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-10-2013, 05:56 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

No Samsung chime, but it never chimed when it was working...

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-10-2013, 05:19 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

Oh, and this is the replacement TCon I got.

I guess it could also be faulty or even the wrong part? But I did check the fuse....

See more | Go to post
Leave a comment:
ikershaw replied to Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-10-2013, 05:11 PM
Re: Samsung LE40C580 no sound/picture, but backlight on

Thanks for the replies and for the warm welcome. I'm a software engineer with a passion for fixing things. I'm reasonably handy with a soldering iron and have a digital multimeter. I've fixed a few things, but had a few failures too!

I agree it should last more than 18 months and do have a claim underway which the UK European Consumer Centre is pursuing on my behalf, unfortunately the supplier is playing hardball and it's been 5 months since the TV went wrong so I've decided to give fixing it a go otherwise it's...

See more | Go to post

Last edited by ikershaw; 01-10-2013, 05:15 PM.
Leave a comment:
ikershaw started a topic Samsung LE40C580 no sound/picture, but backlight on

in Troubleshooting TVs and Video Sources

01-08-2013, 06:52 AM
Samsung LE40C580 no sound/picture, but backlight on

I'm wondering if anyone can help me. I have an 18 month old Samsung LE40C580 LCD TV which has stopped working.

Connect mains power, red power LED flashes on and off. After about 5-6 seconds, white light can be seen if you look through the rear vents (assume backlight is working?). Pressing the power button on the remote causes it to flash but nothing happens.

There's no clicking sound of power relay coming on, when connecting to mains or pressing power on remote.
There's no sound (it's connected to TV ariel)
There's no picture (just black).
...

See more | Go to post

No activity results to display

Announcement

Profile Sidebar

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Samsung LE40C580 no sound/picture, but backlight on