when the tape does not work, check panel pc boards for hot chips
overheating diode pack removal fixed this one
Radio Doctors
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jneupauer@sbcglobal.net
New Member
Last Activity: 03-04-2025, 03:16 PM
Joined: 04-12-2018
Location: Champaign, Illinois
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UN50NU7100F
when the tape does not work, check panel pc boards for hot chips
overheating diode pack removal fixed this one
Radio Doctors
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Re: Samsung qn55q60raf powercycle
QN50Q6DTAFXZA
So, I have found that Qleds ,single or dual cable , have a loop to enable the power supplies located on the main board. any disconnection of ldvs cables will stop the restarting of the TV.
also, no proof yet, using the tape trick may damage the main board power supplies by disconnecting the protection loop and enabling the power on loop.
i think that i have damaged two boards.
i am still trying to figure out looping.
possible pinout for the cable below
1 FB_TRDY_1 2...Leave a comment:
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Re: Samsung QLED Q60R constant reboot issue
this QN55Q60RAFXZA was rebooting.
backlights stayed on when power cable to main was disconnected.
i reconnected the cable.
pulled ldvs cables... set stayed on.
turned up volume... had sound.
remote turned the set on and off normally.
tried each ldvs cable one at a time... set stayed on.
reconnected both ldvs.. set reboots.
i removed panel circuit board cover and let it run with both ldvs cables connected.
felt around the boards until i burnt my finger....Leave a comment:
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Re: Samsung QLED Q60R constant reboot issue
did the tv stay on when you put the original boards back in?Leave a comment:
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Re: Yamaha RX-A3010 working, no sound output
this amp has appears to have speaker relays.
the amp should click relay after time delay.
white flat resistors on each side of amp probably should have 0 volts on center pin. not 0v.. bad channel output circuit.
I would start thereLeave a comment:
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Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
so.... the eprom that I ordered and installed did NOT fix it.
I scoped the ldvs cable... there was no signal on any pin.
Also no enable bl on pin 9 cn805
then I tried baking the board in my toaster oven .. 12 minute timer, 400 degrees.
the set worked.
PTS may referb the board at $125..... [url]https://www.ptselectronicsinc.com/[/url]
Re: Vizio P502UI-B1E has no backligh.../>
so.... the
Leave a comment:
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Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
we had a dead set arrive.. no lower left stand by lamp or on off button function.
Opened up and power 12v and 24v was there.
I saw the post on the thermal pads under the board.
I removed the pads and cleaned the board with 91% alcohol.
The power switch function was restored.
turn on... the led stby lamp lights then fades out ...
power supply stays on.
still no screen light up, I will order eprom which supposedly common a p...Leave a comment:
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Re: LG 37LG10-UM has grey screen color and ghosting
37lg10 t-con t5537t03c02
had washed out picture
here are the voltages after changing the AS15-U...
vgama22 .39
vgma21 .53
vgma17 3.94
vgma16 4.47
vgma15 4.75
vgma13 6.49
vgma12 6.75
vgma11 7.51
vgma10 7.56
vgma8 9.55
vgma7 9.81
vgma6 10.53
vgma2 15.05
vgma1 15.24
Picture now normalLeave a comment:
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Re: New Members - please post your introductions here
Hello All
Today, i have registered and I have some 40 years experience doing repairs.
sometimes i need help... sometimes i can give help.
Dr NoodleLeave a comment:
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