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Louie, Technician
Category: TV
Satisfied Customers: 2557
Experience:  25+ yrs. experience in the field and 5+ yrs. online, down to component level.
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I have A sanyo tv that does not light up so I changed the

Customer Question

I have A sanyo tv that does not light up so I changed the psu but no help so I changed the inverter bd. but no fix also I disconnected the t-con bd. didn't help could this be a bad e-prom in main board. Oh at times trying power it up it may flicker on just instantly then go dark. Thanks Larry
Submitted: 10 months ago.
Category: TV
Expert:  Russell H. replied 10 months ago.

Hi, thank you for contacting My name is Russell. I will do my best to provide the right answer to your question.

That sounds very much like a short that is pulling down the power supply, esp. if the picture forms and shows on the screen for just a second, when powering the TV to On, before it goes black. Is that how it has behaved, even through the parts changes?

Customer: replied 10 months ago.
It doesn't do it every time the power button is pushed but keep pushing the power on button it may flicker instantly one time but at fist time powering on I can hear 4 low pops from speakers.
Expert:  Russell H. replied 10 months ago.

Does the power light ever blink on and off? if so, count the number of blinks before it pauses and then repeats the blink pattern, please.

Customer: replied 10 months ago.
The green light stay on until it turned off also there is 24v to the inverter board and it stayes on until tv is turned off.
Expert:  Russell H. replied 10 months ago.

Do you have a service manual for this brand of TV?

It might cost a little -or it might be free, perhaps, if you're lucky - but it would save some money in boards swapped in that turn out not to fix the problem. It would contain troubleshooting information. Diagrams, part numbers, that sort of thing.

Would you like for me to seek a service manual source for this model line of Sanyo TV?

Customer: replied 10 months ago.
I would. Thanks
Expert:  Russell H. replied 10 months ago.

OK. Expect another posting within the next 30 minutes with some results, I hope...

Expert:  Russell H. replied 10 months ago.

I am terribly sorry - other work appears to have distracted me from posting to this case again.

I must apologize.

Here is a service manual - to not go through it online page-by-page, use the green DOWNLOAD button at the upper left:

If I may provide further advice, let me know.