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Dan, Master Tech and Repair Facility Trainer
Category: TV
Satisfied Customers: 7203
Experience:  USAF trained; A.A.S Electronics; A.A.S. Education; Currently teaching advanced troubleshooting and repair for the DoD.
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My pioneer tv will not turn on. Whats up?

Customer Question

my pioneer tv will not turn on. Whats up?
Submitted: 1 year ago.
Category: TV
Expert:  Dan replied 1 year ago.

Welcome to the site! I'm Dan. Please reply back so I know you're here. Also, are you with the unit now?

Customer: replied 1 year ago.
Expert:  Dan replied 1 year ago.

What's the model number on the back of the TV? Also, are there any flashing lights on the TV when you try to turn it on?

Customer: replied 1 year ago.
Expert:  Dan replied 1 year ago.

OK, when you try to turn the TV on do you see a blue or red flashing light on the front?

Customer: replied 1 year ago.
blue. and it flashes 8 consecutive times
Expert:  Dan replied 1 year ago.

OK, thanks. Did anything happen before this issue popped up? Any storms in your area? Did you disconnect and clean the TV area?

Customer: replied 1 year ago.
Expert:  Dan replied 1 year ago.

OK, then we're looking at an internal issue here. I know what the problem is. Can you give me a few minutes to type up your answer?

Customer: replied 1 year ago.
Expert:  Dan replied 1 year ago.

OK. These Pioneer models use a self-diagnosis feature that tells us where the TV thinks the problem is. They're usually pretty accurate, too. On your 5020FD, the blue LED flashing 8 times indicates a "main IIC communication" failure. This is not an easy issue. It's triggered when the main microprocessor inside the TV senses a data bus / communication failure during the power on sequence.

I've seen this issue caused by a defective power supply board. I've also seen it caused by a defective main board, and also a firmware issue. It really could be caused by a few different things, and you'll want Pioneer to investigate internally. There is a trap switch located inside this TV, so do not disassemble and attempt your own repair. Go direct with Pioneer to locate a servicer around you... I've seen many many customers over the years ruin their Pioneer sets. They're much more difficult to work on than the other brands.

Sorry there isn't a quick fix for this. Let me know if you need anything else. Oh, and please take a second to rate the service I provided (there should be a 5-star scale on your page somewhere). Don't worry, that won't close your question and you can still respond back at any time.

Expert:  Dan replied 1 year ago.

Do you still need help with this?