Sony KD-60X6700E not turning on

[Diah]

TPS: every SMPS on the globe is protected to the short circuits, here we are at basic school..

show us yours modern school where are the SMPS asshole protection .. you have 2 photo from TOP and from downside.

[Davi.p]

Simply doing the habit of reading pwm /control IC datasheets there are always a list of protections with acronyms like OVP (over voltage protection) , OCP (over current protection), SCP (short circuit protection), UVLO (under voltage lock out) and these are achieved with feedback loop (V too high, V too low) and compared / balanced with Mosfet current via Current sense pin input on primary, when there is high current on mosfet and low V on output the alarm bell rings and pwm stops until the next IC start (remove - reinsert power).. this is poor theory, i'm not the expert of psu designs, never been lucky of finding broken tv with bad PS..

[sabretooth]

Update time! So the only diodes I could get quickly were 20A versions, and a quick suggests this is OK to do. So I ordered those, whacked them in and the TV works! I'm going to run it for a while to make sure it stays happy, but so far so good.

Also, I missed disconnecting the ribbon cable that goes to the IR receiver, and damaged the end of the cable, breaking a trace. I cut off the broken bit, and was carefully able to shave the ribbon cable's top layer and expose the traces again. All 100% now.

Thanks everyone for your input.

[lotas]

Well, that's good, as I expected, replace these two diodes and everything will work.