So one of the TVs that I picked up is this Sanyo. I went through the usual testing on this TV It had a shorted SS board I since repaired the board and restored my Voltages.. now powering it up I expected to have a picture of course wouldn't we all but instead of a picture I had a dimly lit screen so the panel is firing which eliminates power supply SS and SC boards but after about 10 seconds the TV turns off and turns right back on. So now I Expecting possibly a mainboard problem although it appears it's getting all voltages from power supply. I check voltage regulators in their spot on. I'm kind of thrown for a loop with look for next right now. I don't suppose a bad logic board could turn the TV off and back on? this TV uses Panasonic internals and if it were a true full-fledged Panasonic I get an error code of course but it's not its a bastard child Sanyo Panasonic mix so that makes fun
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Did I leave the soldering iron on? -
Re: sanyo dp42740 plasma panel lit no picture
Looks like shopjimmy has a repair kit for the mainboard. Audio processor and eeprom i believe. Well I can definitely confirm I have no 13v to the audio circuits. Getting good 15v from the power supply. So I ordered the parts. Well sr how it goes.Did I leave the soldering iron on? -
Re: sanyo dp42740 plasma panel lit no picture
Did the EEPROM ever fix your TV? I have the same problem and I am not sure if the EEPROM will fix it. The TV clicks constantly and tries to turn on. When I unplug the main board the problem stops and the power board turns on for 5 seconds before shutting off. So it sure seems the problem is the main board.
Update: I ordered the EEPROM & audio IC just now, I will update this post when I get it installed. Those audio ICs are expensive so I got this one cheap with the package deal and I will have it when I need it.Last edited by Shane711; 07-13-2016, 10:00 AM.Comment
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Re: sanyo dp42740 plasma panel lit no picture
I installed the New EEPROM chip today and sad to say it did not fix my problem. I have to look further to find out what the cause is.Comment
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Re: sanyo dp42740 plasma panel lit no picture
Ever figure this out? Dealing with same issueComment
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Re: sanyo dp42740 plasma panel lit no picture
caphair, is your TV clicking or just no picture?Comment
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Re: sanyo dp42740 plasma panel lit no picture
OK, give me a while and I should figure it out. I can only do this in my spare time so it may be a few days.Comment
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I have a TCL 55P6US with sound and backlight but no picture. This model does not have a T-CON board, and the right (rear perspective) panel board is fed from the left panel board. I have not been able to induce any change by disconnecting the secondary panel board or the tape cut-off method on the primary board.
There are a bunch of voltages missing on the panel boards. I can't find any shorted caps of the panel boards, and all of the missing voltage rails read in the kiloohms, which leads me to suspect the issue may lie on the circuit board, rather than a short in the panel.
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I recently found myself the proud owner of a later-model Samsung plasma (the PN59D7000 for those keeping score at home) whose panel was, unfortunately, damaged in transport. I'm now preparing to part it out, but am curious as to whether or not any damage would have come to any of the components by attempting to power it up with the panel being broken. I read in one Avsforum thread (for whatever that's worth 😂) that the "scan driver boards" (by which I assume he means buffer boards) could be impacted by doing so. Is that actually the case? If so, since I don't intend on selling bad... -
I recently got my hands on a 60" Panasonic P60ZT60 plasma tv (european model) that has some strange issues along with an 8 blink code.
It know this tv is getting old but it was once considered one of the best plasmas ever made, and i think it is still holds on to that even by todays standards.
So, long story short. When i first got the tv it had a very bright washed out picture with very raised blacks in all picture modes and i couldn't find the cause in the picture setting menus.
After doing a factory reset this problem was gone and the picture was back to...01-06-2025, 06:02 AM -
Saved this beast from the landfill this weekend.
Manfactured July 2013 in Mexico.
I love working on plasma TVs.
Its been a while but I was lucky enough to find 2 this week.
The TV powers on and stays on but no picture. Havent checked for sound yet.
No bulging caps although the insides are pretty dusty and the boards are discolored from many years of high heat.
Will start troubleshooting tonight.
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Picked up this Samsung above thinking it'd be backlights but it isn't. Now MAYBE I'll get lucky.
Found some shorted caps among the panel boards. Each cap along the line is shorted. On every board (3 panel driver boards)I disconnect each side right and left ribbons and they are no longer shorted caps and have about 1.5Mohm resistance (on left and right boards). The middle board has the main board disconnected and the caps are shorted. Last 4 pics show arrow to caps.
Now what exactly do I need to do in order to attempt to fix this issue?
do I have to take each one...
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