BN44-00517C dead - blown cap, resistor and fuse

[Dhikn]

Hi! I have almost the same power supply (BN44-00517A, I suppose the only difference is in the shape of the power connector), but in my case another converter (logic power supply) failed, and the backlight channel should be working. I can measure almost any element of interest on my board in the next few days (including SMD capacitors with a meter). What element values do you need? On my board, the CM804 capacitor burned out, and I can't read its marking. Could you take a photo of its marking on your board?

[dinkodinko]

Hi! I have almost the same power supply (BN44-00517A, I suppose the only difference is in the shape of the power connector), but in my case another converter (logic power supply) failed, and the backlight channel should be working. I can measure almost any element of interest on my board in the next few days (including SMD capacitors with a meter). What element values do you need? On my board, the CM804 capacitor burned out, and I can't read its marking. Could you take a photo of its marking on your board?

Hi Dhikn,

Yesterday I've managed to repair my board.
In addition to other faulty elements, one Zener diode was also faulty, but it measured ok with a diode checker, so it went unnoticed.
On my board CM804 is a ceramic capacitor 220pF, 1kV (marking is 221K) - it failed on my board for LED power also.
When replacing, put a 2 or 3 kV capacitor - it failed because of low voltage rating.
If it has failed then some other components are dead also - resistor 0.24 ohm RM812 (on my board), MOSFET, etc...
The schematic is pretty straightforward, and the PWM controller SSC2S110 is available on Aliexpress.


Good luck!

Dinko

[Dhikn]

Thank you! I managed to fix the power supply too.