Re: Dynex DX-22LD150A11 no pix no sound

Power supply connectors attached. When turned on the pilot led goes from red to blue.
Pin 1. DIM - -0.01 vdc
BL_ON - 0 vdc
Lamp-Err - 0 vdc
12 terminals - 12.13 vdc
5VBS - 5.0 vdc
AC_off_Det - 0.19 vdc
Power supply has 4, 2 pin sockets where plugs from the screen plug into.

What value is the high voltage that goes to the screen for the backlight.
Thanks for your help.

Jack...

Re: Dynex DX-22LD150A11 no pix no sound

7 Pictures uploaded, attached....

Re: Dynex DX-22LD150A11 no pix no sound

PSON must be called BL-ON on Dynex tv,s. This signal is 3.2 v. I have 12v on the power supply going to a 5 volt regulator on the main board. Have 5 v out of the regulator to the main board.

Re: Dynex DX-22LD150A11 no pix no sound

Thanks for your reply to my post. I have some knowledge on repairing CRT type tv,s but no experience repairing LCD tv,s. I don,t find any markings on the main board or power supply to indicate where i can find the PSON signal. In relationship to CRT TV,s, what is PSON and where can i find it. Is it AC or DC signal. I do not have a schematic.
I have a scope if needed.

My grandaughter,s Dynex tv was dead. Replaced SG6742 in power supply.
Now have 12v, 5v, red led comes on and changes to blue but nothing else works. There is no voltage on BL_ON, no voltage on Dim, 0.2 v on AC-OFF-detect. 5Volt regulator on main board is good. no sound, no pic, no backlight. No back light is out because one winding is open in the inverter xformer.
The tv went out during a thunder storm. There is no visable evidence that it was hit by lightning. Fuse was not blown. How can i check the screen, if it is bad, it will not be worth repairing. Recommendations ?

Re: New Members - please post your introductions here

Electronics is now a hobby since I retired from a computer maintenance co. 10 years ago. My first computer was a South Western Technical Products 6800 kit.. 2K memory 1 Mhz processor, Flex operating system. I am a Amateur Radio operator, and fly my own plane, so I stay busy. Like to repair friends, neighbors, and relatives computers and other electronics gadgets. Glad to find this forum. Oh, age, 91.