Philips 43PUH4900/88 will not power up

[R_J]

Re: Philips 43PUH4900/88 will not power up

Since you have a scope, do you have any output from the LD5532GS ic? 12v on the vcc pin seems low, it should be closer to 16v to turn on. Also check the dc voltage on pin #1 it should be over 1 volt dc, if 0.8v or less the ic will be off.

[HellasTechn1]

Re: Philips 43PUH4900/88 will not power up

I measured the output and is 0V. Right after taking the measurement my probe's tip sliped and shorted pins 5 and 6. Now i have a main fuse blown and R9308 and 9309 shorted. I am also going to measure the mosfet later and let you know. The LD5532 is probably dead also, if it wasnt dead before. Also is D9304 a zener diode ? It reads like a normal low impedance diode on the DMM (the same before i shorted the ic).

[HellasTechn1]

Re: Philips 43PUH4900/88 will not power up

And yes. The mosfet is also shorted now. So i guess i have to order a new LD5532GS, replace the mosfet and the resistors and it might as well work all right.
Is D9304 a zener diode indeed ?

[lotas]

Re: Philips 43PUH4900/88 will not power up

D9304 -SS1060FL is not a zener diode, it is a 60v 1.0A SURFACE MOUNT SCHOTTKY BARRIER DIODE

[HellasTechn1]

Re: Philips 43PUH4900/88 will not power up

Right. Thanks !
I mixed the schottky symbol with the zener symbol.

[HellasTechn1]

Re: Philips 43PUH4900/88 will not power up

I am going to place an order on ebay for the parts. It will probably take a month or two before i get them. I am going to post back to let you know what happened.

Thank you all for your help !!!