How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Pete Your Own Question
Pete
Pete, Electronic Engineer
Category: TV
Satisfied Customers: 15775
Experience:  Over 16 years of experience installing and repairing electronics.
30970729
Type Your TV Question Here...
Pete is online now
A new question is answered every 9 seconds

Wont power up. TV light comes on 5 secs then powers down. No

Customer Question

Wont power up. TV green light comes on for about 5 secs then powers down. No video, no sound.
Replaced power, logic and main boards. Checked voltages going to Y sustain and Z sustain...seem to be fine if Im checking it right.
Submitted: 5 months ago.
Category: TV
Expert:  Pete replied 5 months ago.

Hi there

Customer: replied 5 months ago.
Hello
Customer: replied 5 months ago.
You here?
Expert:  Pete replied 5 months ago.

Thanks for getting back to me.

Do you have any circuit diagrams or schematics available?

Does the TV power on ok if the Y-SUS and Z-SUS boards are disconnected?

Customer: replied 5 months ago.
No difference if the y and z sus are disconnected. The schematic I have is 7mb ...too large to upload here. Take a look at page 9 with the power failure circuit. Even tho I have replaced the main board already.
Let me know if I can upload to a dropbox or email the file to you.
Expert:  Pete replied 5 months ago.

Ok, let me check if the other experts have any idea on this...

Customer: replied 5 months ago.
Any help on this matter?