No backlight, but displays picture
I’m needing help trying to fix my TV. I have a D55un-e1, and the power supply board has the LED driver parts included (PLTVHU401XABV) Hyperlink to see picture of the board.
Did the flashlight test - there is picture, but NO backlight. Haven’t checked sound, but I’m assuming that it works since image shows (probable sign of T-Con and Main boards working).
I used the multimeter to test connection points on the main driver that goes directly into the panel. There are only 2 types of actual points - VLED and VLED 1. Everytime I read the points, I only get readings from VLEDs, but 0’s from VLED 1s. With the power on, I get the reading of 33.5 from all VLED points (only about 4 of them) and 0’s from VLED1 points.
What could be the issue? I know it’s probably the LED inverters/driver board section of the power supply board, but I don’t see any burn marks nor lose capacitors/parts. I’m pretty new to this TV-fixing-realm, so I have no idea what could be the issue. I’ve even replaced the main board as well.
Would really appreciate the help!
Thanks again for your help! I got my led tester, but with this power supply/led driver board, I’m not too sure where to stick the positive and negative needles (?)
Would you happen to know which goes where?
Really appreciate it!
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