Sanyo fw65d25t no picture; good sound

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

You said same symptoms as thread starter, does that mean you have sound but no image?

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

See the white sticker on the powerboard? what is the set of numbers to the right? or just write them all here.

[dcsharpsr]

Re: Sanyo fw65d25t no picture; good sound

Here they are...

[dcsharpsr]

Re: Sanyo fw65d25t no picture; good sound

White label is..

SH150314111314
5510FB 81-PBE055-H08

I don't have any audio as I can't select an input other than turning it on and off by either the remote or buttons on set.

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

Ok, what I would do, there's probably more efficient methods but I'm no expert: Unplug all connectors from powerboard including power cord, best policy is to use a resistor prolly 1k ohm or a little less to carefully jumper pwon pin with stby pin, then plug in power cord and carefully test all the pins on all connectors, just test the pins don't hook any of the cables up, report what you get, black - meter probe on metal chassis ground, report voltages minus grounds.

[dcsharpsr]

Re: Sanyo fw65d25t no picture; good sound

Did you get the post with pictures?

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

Yes.

[dcsharpsr]

Re: Sanyo fw65d25t no picture; good sound

Sorry for the delay
Voltages on the connector pins are all 5.3
Voltages on the capacitors read 5.3, 12.3 and 56.6

[dcsharpsr]

Re: Sanyo fw65d25t no picture; good sound

CN3 Voltages
1-4=0V
5 12.3V
6-8 = 56.6
CN2 Voltages
1-2 Ov
3-4 12.3

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

If there's a problem with one of your readings I don't see it, hook all the boards back up, turn tv on, on the ld driver board, connector PD1, check the voltage on pin 3, that's with the cable on, so you need to contact the metal part of the top of the connector, report the voltage.

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

Might be getting something wrong here, you said you have backlight but no image right?

[dcsharpsr]

Re: Sanyo fw65d25t no picture; good sound

Voltage in pin 3 of that connector seems to be floating around from 3.0 to 5.2 volts...not stable at all.

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

And you have steady backlight?

[dcsharpsr]

Re: Sanyo fw65d25t no picture; no sound

Yes the background light is steady. Also, I see that the 3 wire cable goes to the main board, which has been replaced in the beginning.

Going to bed for now...

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

Voltage in pin 3 of that connector seems to be floating around from 3.0 to 5.2 volts...not stable at all.

Not positive but that doesn't seem right, wonder why it is fluctuating.

[dcsharpsr]

Re: Sanyo fw65d25t no picture; good sound

Don't know if the voltage is generated by the LED Driver board or Main Board

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

Voltage in pin 3 of that connector seems to be floating around from 3.0 to 5.2 volts...not stable at all.

That is the bl-on pin and you do have backlights, just not sure if it's suppose to be steady or not.

[dcsharpsr]

Re: Sanyo fw65d25t no picture; good sound

I'm certainly not that savvy to know what the Bl-on means except to extrapolate that it means backlight on. And with the fluctuating voltage found here, I would imagine that it should be a solid "high or low". but it's not. I had previously replaced the Main board and realized no change so maybe that means the LED Driver board is bad. Unless someone had additional knowledge, I guess I'll find a replacement LED Driver board and go from there. I wished I could have a place that had all the modules in a kit form but all I have found is that they are sold out.

Thanks for all your help NoMoreSony and I'll just continue on.

Don
dcsharpsr@gmail.com

[nomoresonys]

Re: Sanyo fw65d25t no picture; good sound

Wish I could help more but I don't have the expertise but some of the people here are supertechs, a lot of times they can tell you what's wrong with just a brief description, it amazes me. I'll be watching, hopefully you can solve this puzzle, youtube has a lot of fixit videos too, I learned a lot there but my memory is shot, it fell right out of my head

[dcsharpsr]

Re: Sanyo fw65d25t no picture; no sound

I know what you mean. I was an TV Broadcast engineer and used to repair LED monitors and such. This one has me stumped. Now I forgotten more than I learned! Lol
Hopefully Someone has some more ideas. One did mention to check the fuse on the T-con board but can't find it.
Thanks again.