Hi, my Samsung UE55MU6479 stopped working. No standby light; when I disconnect the PSU cable to the mainboard, the backlight turns on. In this forum, other people had the same problem with similar TVs and flashed some memory chip to fix it. Can somebody please point me in the right direction as...

You have a working power supply and backlight. The motherboard is faulty. Do you have diagnostic capabilities? I have no knowledge if a soft exists and if it will help in case even the standby led does not light up.

Samsung UE55MU6479 No Standby Light—Which Memory Chip to Flash and Firmware Needed?

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#1 21867585 21 Mar 2026 22:05

anderle98 anderle98

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21867585 21 Mar 2026 22:05

Hi, my Samsung UE55MU6479 stopped working. No standby light; when I disconnect the PSU cable to the mainboard, the backlight turns on. In this forum, other people had the same problem with similar TVs and flashed some memory chip to fix it. Can somebody please point me in the right direction as to which chip to flash and what firmware to use? Thanks a lot!
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#2 21867782 22 Mar 2026 10:21

zdzich42 zdzich42

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21867782 22 Mar 2026 10:21

You have a working power supply and backlight. The motherboard is faulty. Do you have diagnostic capabilities? I have no knowledge if a soft exists and if it will help in case even the standby led does not light up.
#3 21867991 22 Mar 2026 14:43

crazycavan crazycavan

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21867991 22 Mar 2026 14:43

see this link
https://www.elektroda.pl/rtvforum/topic4084799.html#21288385
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Samsung UE55MU6479 No Standby Light—Which Memory Chip to Flash and Firmware Needed?

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