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Search: Posts Made By: dskall
Forum: Troubleshooting TVs and Video Sources 08-04-2022, 06:23 PM
Replies: 11
Views: 202
Posted By dskall
Re: Sony KDL-46R450A No Power, No red LED status

I would say you have a mainboard problem.
Forum: Troubleshooting TVs and Video Sources 08-01-2022, 01:08 PM
Replies: 28
Views: 336
Posted By dskall
Re: Samsung UN55H8000AF - No Picture, Working Backlight, Replaced T-Con Board

I believe TV will work without t-con connected to chassis. And there are grounds going through LVDS cable, So maybe a problem on mainboard or cable.
Forum: Troubleshooting TVs and Video Sources 08-01-2022, 12:32 PM
Replies: 28
Views: 336
Posted By dskall
Re: Samsung UN55H8000AF - No Picture, Working Backlight, Replaced T-Con Board

You have 3 leds on but dim. T-con change did nothing and your 12v is steady. Seems like bad ground.
Forum: Troubleshooting TVs and Video Sources 08-01-2022, 12:19 PM
Replies: 28
Views: 336
Posted By dskall
Re: Samsung UN55H8000AF - No Picture, Working Backlight, Replaced T-Con Board

And with both ribbons to panel off you get same lights?
Forum: Troubleshooting TVs and Video Sources 07-31-2022, 09:25 PM
Replies: 39
Views: 548
Posted By dskall
Re: Phillips 55PFL5602/F7 T-Con failure?

You can use alcohol to find hot component.
Forum: Troubleshooting TVs and Video Sources 07-31-2022, 05:57 PM
Replies: 39
Views: 548
Posted By dskall
Re: Phillips 55PFL5602/F7 T-Con failure?

So, you basically have only 12v on t-con with cables hooked up? And you checked voltages when you removed cables and same no voltage?
Forum: Troubleshooting TVs and Video Sources 07-30-2022, 10:44 PM
Replies: 2
Views: 124
Posted By dskall
Re: Samsung LE32E420E2W Troubleshooting Assistance

I would try a new t-con. Or post good picture of t-con.
Forum: Troubleshooting TVs and Video Sources 07-30-2022, 11:14 AM
Replies: 38
Views: 607
Posted By dskall
Forum: Troubleshooting TVs and Video Sources 07-29-2022, 09:04 PM
Replies: 38
Views: 607
Posted By dskall
Re: Vizio 40 V405-H19 has backlight, no display

You could check those test points for shorts. You could cut the traces and check the voltage. Check the caps around the ic. Check for 12v to the ic.
Forum: Troubleshooting TVs and Video Sources 07-29-2022, 03:11 PM
Replies: 20
Views: 315
Posted By dskall
Re: LG 55UB8500 no picture.

Why are you giving picture of t-con? You said you have no voltage going to t-con. Thus you need to look on main board and find where you are losing the 12v.
Forum: Troubleshooting TVs and Video Sources 07-29-2022, 11:23 AM
Replies: 4
Views: 161
Posted By dskall
Re: Samsung UN65HU7250 Power Supply Repair

As long as thier intact and have continuity they should be fine. They are just compressed ferrite
Forum: Troubleshooting TVs and Video Sources 07-29-2022, 11:19 AM
Replies: 20
Views: 315
Posted By dskall
Re: LG 55UB8500 no picture.

How could I have location? You provide no pictures or schematic. Trace the 12v from t-con terminals back to trans. that controls the power to t-con.
Forum: Troubleshooting TVs and Video Sources 07-29-2022, 10:36 AM
Replies: 11
Views: 239
Posted By dskall
Re: SAMSUNG UN50TU8000F rebooting, backlight ok. No 12v to panel boards.

Still learning, but I think on PNP that gate will need to be negative (-1.7v) in respect to source
Forum: Troubleshooting TVs and Video Sources 07-29-2022, 10:29 AM
Replies: 11
Views: 239
Posted By dskall
Re: SAMSUNG UN50TU8000F rebooting, backlight ok. No 12v to panel boards.

Can we get some good picture of panel boards??
Forum: Troubleshooting TVs and Video Sources 07-29-2022, 10:23 AM
Replies: 20
Views: 315
Posted By dskall
Re: LG 55UB8500 no picture.

Check transistor that switches on voltage to t-con.
Forum: Troubleshooting TVs and Video Sources 07-28-2022, 09:49 PM
Replies: 38
Views: 607
Posted By dskall
Re: Vizio 40 V405-H19 has backlight, no display

The main supplies 12v, data signals and some other information. The t-con generates the required panel voltages and timing signals to run the panel. The chip around your vgh and vgl test point is...
Forum: Troubleshooting TVs and Video Sources 07-28-2022, 09:43 PM
Replies: 11
Views: 239
Posted By dskall
Re: SAMSUNG UN50TU8000F rebooting, backlight ok. No 12v to panel boards.

Not sure the t-con is on the panel. Probably a short on board or panel causing reboot.
Forum: Troubleshooting TVs and Video Sources 07-28-2022, 09:27 PM
Replies: 38
Views: 607
Posted By dskall
Re: Vizio 40 V405-H19 has backlight, no display

As far as voltages the main only supplies 12v. Required panel voltages are generated by t-con
Forum: Troubleshooting TVs and Video Sources 07-28-2022, 08:57 PM
Replies: 38
Views: 607
Posted By dskall
Re: Vizio 40 V405-H19 has backlight, no display

VGH and VGL are generated on t-con.
Forum: Troubleshooting TVs and Video Sources 07-27-2022, 03:27 PM
Replies: 20
Views: 315
Posted By dskall
Re: LG 55UB8500 no picture.

Are backlights coming on, flashing? If not, is there a picture on screen using a flashlight?
Forum: Troubleshooting TVs and Video Sources 07-27-2022, 03:24 PM
Replies: 2
Views: 238
Posted By dskall
Re: Samsung UE40JU6445K eeprom

Have you got 12v to your t-con? Checked voltages on mainboard?
Forum: Troubleshooting TVs and Video Sources 07-26-2022, 12:20 PM
Replies: 38
Views: 735
Posted By dskall
Forum: Troubleshooting TVs and Video Sources 07-26-2022, 10:43 AM
Replies: 6
Views: 225
Posted By dskall
Re: LG 55EA870V with partial life, but no picture - Freebie again

That's what I get for just skimming the post.:facepalm:
Forum: Troubleshooting TVs and Video Sources 07-26-2022, 10:12 AM
Replies: 6
Views: 225
Posted By dskall
Re: LG 55EA870V with partial life, but no picture - Freebie again

Are you getting backlights? A picture with flashlight held to screen?
Forum: Troubleshooting TVs and Video Sources 07-26-2022, 09:51 AM
Replies: 38
Views: 735
Posted By dskall
Re: Samsung UE46EH5000 - Flashing red light but not turning on

I think this is your schematic. What voltage do you get at your ps_on terminal in standby and power on?
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