I can't figure out why the mainboard shuts this tv down to standby. I downloaded the manual and checked the DC to DC converters and all my readings are the same as the service manual
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Re: VIZIO VX37L HDTV turns on for 5 seconds then VIZIO logo turns amber
Did you get to see the backlights on in the first 5 seconds? The LDO regulators voltages are all good?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: VIZIO VX37L HDTV turns on for 5 seconds then VIZIO logo turns amber
Hi Budm, Yeah the blue screen comes up w channel info and it shutsdown to amber, if i push the power button it cycles again. No need to unplug power cord.
All the LDO voltages are according to the service info. What do ya think?
I am so much getting tired of buying used boards and half of them don't work...Comment
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Re: VIZIO VX37L HDTV turns on for 5 seconds then VIZIO logo turns amber
What happen if you disconnect the power cables from the power supply to both inverter boards? Does the PS_ON drops out?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: VIZIO VX37L HDTV turns on for 5 seconds then VIZIO logo turns amber
the ps_on signal stays on at 4.6volts about 2 seconds after the set goes amber. with and without the inverters plugged in makes no difference...
there are almost twice the amount of those little dc to dc converters than what the troubleshooting tree in the service info talks about. and they are marked on the board differently such as DU4 for instance instead of u4 or u8 or u9. the left half of the board has a d in front of everything. I breifly sampled the converters not listed and none of them seemed low although the DU4 shuts off when the set goes amber input 3.3 output 2.7 to chassis ground.
IMO the left side of the board looks like mostly digital tuner and hdmi...
Since I'm not finding anything obvious... Could I be chasing a ghost and possibly have some kind of eeprom or firmware issues?
Is there anyone versed well enough to repair my board rather than replacing with unknown used donor?
when i send out a repair with a used donor board I don't sleep well
Last edited by high-tech; 05-06-2013, 09:52 AM.Comment
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Re: VIZIO VX37L HDTV turns on for 5 seconds then VIZIO logo turns amber
I'm not a pro, so take anything I say with a grain of salt
That's the same(super close, maybe diff rev) PSU that's in my VIZIO. Have you tried jumping the ps_on and inv_on, just to see if the backlights stay on?Comment
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Re: VIZIO VX37L HDTV turns on for 5 seconds then VIZIO logo turns amber
I don't think keeping the backlight on would make things better... The whole television shutsdown as if it were just plugged in the wall waiting for you to turn it on.
For some reason the mainboard won't stay on, IDK why but I do know this.
the power supply is ok I have a test power supply for this set.Comment
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Re: VIZIO VX37L HDTV turns on for 5 seconds then VIZIO logo turns amber
Yesterday One guy gave to me a broken screen Vizeo Vx37L HDTV10A.
The main board # is 0171-2272-2174. bar code 3637-0032-0150 (4B)
http://www.shopjimmy.com/catalogsear...0171-2272-2174Last edited by hienton2; 05-06-2013, 03:56 PM.Comment
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vizio e650i-a2 (LWJAOZBP Serial) led backlight flashes then turns off, has video (via flashlight) and audio.
panel: au optronics T650HVN05.4
72 led total on 12 strips, 6 led per strip wired in three groups of 24 (led driver board has three anode and three cathode pins)
link to datasheet: https://datasheetspdf.com/pdf-file/8.../T650HVN05.4/1
Vizio 56.04219.641G (liteon PA-3231-01WN-LF) Power Supply Unit
https://www.shopjimmy.com/vizio-56-0...-power-supply/
Vizio 55.75J01.001G (91.75J10.004G) Main Board... -
Ok so here's the story. I was watching tv one day when all of a sudden I heard a pop from the back of the tv set and rushed to unplug the set. By this time the tv already had smoke coming out the back. It was not storming or inclement weather that day to cause a power surge to the best of my abilities. When I opened the tv up, I found that the three capacitors on the psu (highlighted in red) were all bulging and looked they had exploded. I replaced all of them right away and when I went to start up the tv after the "fix" it started just showing the flashing vizio logo as soon as power... -
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Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
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- ACN (BQACN) 19.6v
- ACP (BQACP) 19.6v
- CMSRC (BQCMSRC) 19.6v
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Vizio M60-C3 powers on, perfect logo, turns off. If you don't touch anything it will repeat this process by itself until it is unplugged. Not the "button board" since I disconnected the cables to the main board and the problem persisted. So I'm fairly positive something is going on with the main board, but want to know if there is a fix for this other than replacing the expensive mainboard, which may eventually have the same problem. Also, heat sink was hot as hell when this all started. Unplugged for a few days and same thing happens.
My kids are getting antsy waiting...
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