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Forum: Troubleshooting TVs and Video Sources

12-07-2021, 01:44 PM

Replies: 28

TCL 75R615 has sound, no backlight

Views: 1,766

Posted By R_J

Re: TCL 75R615 has sound, no backlight

If they don't check shorted, they are very likely ok. For a proper test you need to remove them and that could just cause more problems.

Forum: Troubleshooting TVs and Video Sources

12-05-2021, 10:09 PM

Replies: 28

TCL 75R615 has sound, no backlight

Views: 1,766

Posted By R_J

Re: TCL 75R615 has sound, no backlight

It seems to be the PFC circuit that has the shorted cap. The main board, t-con etc. likely operated and gave video but the led circuit needed the higher voltage and current to operate.

Forum: Troubleshooting TVs and Video Sources

12-05-2021, 10:06 PM

Replies: 28

TCL 75R615 has sound, no backlight

Views: 1,766

Posted By R_J

Re: TCL 75R615 has sound, no backlight

The 1k will be fine if that is what you ordered.

Forum: Troubleshooting TVs and Video Sources

12-05-2021, 08:59 PM

Replies: 28

TCL 75R615 has sound, no backlight

Views: 1,766

Posted By R_J

Re: TCL 75R615 has sound, no backlight

I would remove the disc cap and check it out of circuit, I would also check the mosfet QW301 & QW302. I usually replace these 1kv caps with a 2kv

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