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Equipment Repairs => LCD TV forum => Topic started by: J_@_N on October 01, 2022,19:46:37

Title: sAMSUNG 32" UE32EH5000K
Post by: J_@_N on October 01, 2022,19:46:37

I have 32" UE32EH5000K and I`m in a pickle. I can see the picure with torch against the screen so problem with backlight, OK. I`ve checked power board and there is 240V going to LED strips (tested to ground) so next tested, with 30V battery, each of my 4 LED strips (10 LED each) and all fine. I`ve tryed disconecting the logic board but the back lights stay down. Any ideas?

Title: Re: sAMSUNG 32" UE32EH5000K
Post by: downunder on October 02, 2022,04:44:53

240V LED supply is way too high for a 32 inch - the same model in 40 inch only uses 110V and probably has more LEDs in it. The return path for the LED strings (LED - or L-) should read between 2 and 15V approx. wrt chassis ground. If it too reads high then there is no return path for the LEDs on the power board.
Can't say what may be actually faulty. The return path is usually via a chip.                                  Bruce

Title: Re: sAMSUNG 32" UE32EH5000K
Post by: jagsteve on November 08, 2022,18:09:01

Check the 47uF 160v capacitor in the power supply. It often fails causing this issue.