sanyo no back ligth

[ealequi]

I have a sanyo dp42647 when i turn it on there is a black screen with sound. If i put a flashligth close to the screen i can see the video. Any idea?

[Pentium4]

Re: sanyo no back ligth

It's 100 times easier if you post close up clear pictures of all the boards and have a multimeter ready for troubleshooting

[ealequi]

Re: sanyo no back ligth

I still learning how to use this forum. I has to learn how to load the pictures

[Pentium4]

Re: sanyo no back ligth

When replying click Go Advanced, and attach the pictures using the Attachments button

[ealequi]

Re: sanyo no back ligth

ok

[ealequi]

Re: sanyo no back ligth

[ATTACH]54191[/ATTACH]

[ATTACH]54192[/ATTACH]

[ealequi]

Re: sanyo no back ligth

[ATTACH]54193[/ATTACH]

[ealequi]

Re: sanyo no back ligth

sorry. this is the main board, not the red one

[MisterD]

Re: sanyo no back ligth

I suggest that you post the Model Number and also take some closeup pictures of the white connectors on the power supply board and be sure that the picture shows the markings on the circuit board at the connector that tells us which pin is which, usually the markings are Stby, PSON, BL_ON, 3.3V, 5V, 12V, 24V.

[jetadm123]

Re: sanyo no back ligth

Also post a good focused photo of the bottom of your power board.

[ealequi]

Re: sanyo no back ligth

I suggest that you post the Model Number and also take some closeup pictures of the white connectors on the power supply board and be sure that the picture shows the markings on the circuit board at the connector that tells us which pin is which, usually the markings are Stby, PSON, BL_ON, 3.3V, 5V, 12V, 24V.

ok i will

[ealequi]

Re: sanyo no back ligth

Ok this are the new picture for the sanyo DP42647

[ealequi]

Re: sanyo no back ligth

this are the new picture

[jetadm123]

Re: sanyo no back ligth

Need a photo of the bottom of the power board.

[ealequi]

Re: sanyo no back ligth

[ATTACH]54202[/ATTACH]

[MisterD]

Re: sanyo no back ligth

ok i will

Sorry, I didn't see the Model Number in Post#1 is sanyo dp48249, I looked at a backlight inverter board like yours at shopjimmy.com and I see that it has some fuses they appear to be white with gold ends, you should check continuity of these fuses to make sure they are not open.

[ealequi]

Re: sanyo no back ligth

ok i will do that now. thanks

[ealequi]

Re: sanyo no back ligth

No. this has no inverter board. just the t-con board

[MisterD]

Re: sanyo no back ligth

with the tv powered on, check the voltage on the small white connector that has the 3 black and 1 white wire, it's near the edge of the power supply board, I see it is labeled BL_ON, hook a volt meter with the black probe to chassis ground and use the red probe at the connector making sure it touches the metal part where the wire goes in, set your meter to DC Volts, report the voltage reading back here.

[MisterD]

Re: sanyo no back ligth

No. this has no inverter board. just the t-con board

Okay, maybe the inverter is included on the Power Supply board.