Sharp TV- 13N-M100B power up then shutdown immediately(help)

rholly1975 · Guest

Hey guys, I have this tv with a good picture and sounds but suddenly while im watching my favorite tv program last night it was shutdown automatically without warning or anything. i came to check and power-up again but i have no luck. Since i am beginner in electronics repair, when i looked up the tv, there is no burnt parts inside or any blown caps. The i used to replaced IC701 (TEA1507) and Q701 (STP6NC60FP) with the same parts. Now, when i power-up there is an start-up and deflection comes but still goes off in just a second. No raster at all or even sound just heard one click followed by another one click and thats all. HOT is Ok. What im supposed to do? HELP me please! thanks in advance[/code]

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

How do you know the HOT is good?

rholly1975 · Joined: 09 Jul 2008 Posts: 1

I have said that HOT is good because i tried to replaced it by D2499 and tried the other one D1555 bought from electronics store with equivalent replacement NTE2331.

By reading some post to this forum regarding "voltage measurement" on horizontal output transistor, i measured almost 300vdc supposed to be a 127vdc which was printed on circuit board. Hope its not a flyback fault.