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Samsung UE40F5500AK

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Turnip:
Hi folks,

Got one where backlights work but no picture. Note Bruce suggested IC200(ISL9860) on the T/con might be duff. Thought get some then noticed chip is a multi-contact SMD, so didn't bother although they're quite cheap.

Suspect T/con from smashed screen sets might be dubious guarantee wise considering the price. New panels available but at a price where folks would rather buy a new TV. Looking for a firm who enjoy changing T/con SMD chips - Chris.

astracat:
hi turnip
presume fuse on tcon ok,several vids on utube showing how they change the chip or ohms do a postal fitting .
regards
astracat

downunder:

Hi Chris,

Are there any blue LEDs on the T-Con. Some have 3 LEDs. If all 3 are lit, the T-con is OK. If any of the LEDs are out, though, it could be T-con or panel.                     Bruce

Turnip:
Thanks, Cat and Bruce

Will look for T-con fuse, guess jumped the gun thinking IC200 duff. No lit Leds so guess supply missing. Will take a look on Utube - Curious to see how the chip is replaced - Chris.

Turnip:
Hi folks,

Had a good look, and my RUNTK 5351TP-0055FV doesn't seem to have any Leds. Spent an hour on YouTube where seems every issue but mine was covered in various languages.

Fuse OK - Feeds Q300 which is an NPN 3 pin SMD of some sort, and appears OK resistance wise, but no output voltage though fed with 13v via the fuse. SMD Q300 is marked as C403-312 where I could find nothing. Nearby is a 8 pin SMD chip bearing the legend Y86-0701-308 - Again nothing anywhere.

Note that China does new panels at £30.00 so think go for one. Odd that a Sammy screen uses a Sharp T-con, especially as later Sharp sets tended to use Vestel innards, as had fewer issues - Chris.

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