Re: vizio backlights but no video or audio
integrated into the panel.
bmmc
Member
Last Activity: 04-24-2022, 11:09 AM
Joined: 11-10-2009
Location:
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vizio backlights but no video or audio
m# d48-do.came to shop with no audio,video or menu.has backlights.replaced main and power boards from SJ.no change,what am I missing here? -
hisense 50h5g no video or audio
set came to shop standby led only.replaced two individual leds & now have backlights.no vidio,audio,menu,or input selection.replaced main but no joy.no schemo available.voltages on power supply board are completely wrong.voltages on 10 pin connector to main are as follows,21v,3.7v,12v,2.8v,3.4v.can anyone tell me if these are correct? -
sharp aquos crap shoot?
m#lc-40le810un.customer complaint dead set.no led,audio,video,backlights.no signs of life.fuses ok & 168v raw b+ on caps c7800a & b.5v standby out of power supply to main.3.3v out of main.no other voltages.not much in manual at techdata.suspect no turn on from main but also could be power supply.any ideas on pinning it down to one board? -
lg 50lb6300 flashing leds after 10 min.
set came to shop with flashing leds.found 3 bad leds on 3 different strips using SJ led tester.replaced all strips with new ones from SJ.no joy. hard wired and soldered all strip jumpers and connections.also reflowed solder connections on power board where led connecter plugs in.same result.all 5 rows light up at plug in but after 10 min 3 rows begin flashing and nothing from other 2 rows.jumper 2 center pins on led plug all 5 rows light using tester.I'm thinking nothing else could be the culprit other than power board.anyone run into this problem? -
vizio led backlight problem
Joined: 22 Feb 2005
Posts: 94
Location: crescent city fl
PostPosted: Mon Jun 11, 2018 12:02 pm Post subject: vizio led backlight problem
m#e48u-do came to shop no backlights.replaced one single led with a 3528 led.now set plays but leds go from bright to dim on all picture modes except calibrate dark .at this mode backlights are steady but dim pix & led volts steady at 23v.when in other pix modes leds change from 23v to 32v.menu on remote does nothing so I cannot turn backlights down.any ideas? -
samsung m#un60ju650df "dog"
set came to shop nothing but standby led lit.one of the two sets of leds not lit using the led tester.found a bad led on two strips.replaced strips and now all leds light.still same symptoms,no leds,no audio,no video using flashlight test.if I unplug the main or tcon leds light.replaced main,power board and tcon.this one has me stumped.any ideas from the pros? -
led voltage?
working on a insignia M#ns-37d20sna14.no led backlights,audio ok.0v between led+ & led- pins.what should the led voltage be?getting a backlight on command from main.new to led sets.suspect power supply. -
upside down pix
lg 32n530b.after replacing main board pix is upside down.any clues? -
bad tcon?
lg m#42lg50 solarized pix but osd is clear.does the good osd rule out the tcon? -
sanyo dp46841 no video or audio.
no osd.backlights are on but screen is dark.can see backlights on thru holes in back of panel.power supply voltages on the money.green led on at power up but nothing else.set has a digital & analog board.i'm thinking bad digital.any ideas?same on all inputs. -
sharp lc-20dv20u no backlights
audio ok.can see video with flashlight.where is the inverter board on this thing? -
panasonic no video or audio
m#th-50px80u plasma.no video audio or osd.very dim raster.when turned off have to unplug set to get it to turn back on.power supply voltages are on the money.i suspect the a board.any clues?
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