Re: vizio vp50
So you changed your meter battery and it reads different?
So you changed your meter battery and it reads different?
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Re: vizio vp50
and with old worn battery 7.65 volt output and on breadboard i get 4.28 volts....
and before battery change it read 4.10 volts what gives?Comment
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Re: vizio vp50
You should be changing your multimeter battery not TL431 supply.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: vizio vp50
i put the old worn battery 7.65 output back on it and it read 4.28 ....
i bought 2 new 9 volts and changed dmm..of course i changed it's battery lol..Comment
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Re: vizio vp50
and i put the old worn out 9 volt battery back on the breadboard tested with old and new battery sorry if i threw confusion ....Comment
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Re: vizio vp50
I cannot explain your readings. You should be seeing 2.495V with 2% tolerance. What are you seeing between ref and anode i.e. 1 and 2.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: vizio vp50
i think that might be the answer your looking for if i switch the probe i get 02.5v pin 1 and 2 but it a wild guess on my part...Comment
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Re: vizio vp50
It looks better but with that configuration you should get Vka = Vref (i.e. they should measure the same.)Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: vizio vp50
I'm thinking it's probably OK but there's another problem elsewhere. Put it back in the set. Any way at all to do some in circuit tests of it?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: vizio vp50
i will put a different TL431 back in to rule out original....now that i figured out macros on the camera could get better pic if you would like to get better look...Comment
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Re: vizio vp50
what are the other possibilities on this power supply that could cause low VA voltage?Comment
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Re: vizio vp50
Bad adjustment pot is one possibility.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: vizio vp50
That's one test also it may say something like B100K on it which indicates resistance between two outer pins.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: vizio vp50
It shouldn't climb to infinite; make sure your meter is set on 200kohm range.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Hi everyone,
Brought a non functionnal PS5. Apparently only a bad PSU...
No beep, nothing.
After some tests i found this :
- PSU is fine (12 volts stable)
- 12 volts line is shorted
- DA9065 was fried, F7003 also => Replaced both of them, short is gone on 12 volts line, no dead short anywhere else.
- By the way, nothing change. No signal, no power, no beep.
Mesuring all rails with my workbench psu (12 volts input)
- 0.00 amp drawing
- 12 volts, 5 volts, 2 volts, 1,15 volts are presents (suppose new DA9065 do is... -
Failure Symptom
No picture, just red vertical stripes. Google search shows quite common problem for these recent Vizio M series although red vertical stripe pattern may differ. Some call it "Netflix" boot screen haha.
Where is the short?
Panel has 4x buffer boards. Quickly found the 1/4 panel buffer board with the problem by selectively disconnecting buffer board flex cables.
Having recently fixed another Vizio with similar symptoms that was a shorted ESD diode array ( link ) Probed the ESD diode array but... -
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
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... -
Hello,
Dell Latitude 5420 P137G
Board: LA-K491P REV A01
I have received this laptop which was described as "does not power on or accept charge." Battery shows no sign of charging when charger is plugged in, nor does the board show any signs of life when battery is unplugged and charger is plugged in. No light from the LED at all or any other indications of activity.
Board seems to have no shorts, all power rails are fine and show high resistance.
When charger is plugged in, voltage is present in 3.3V rail but absent in others.... -
Bug looks like hardware so thought I posted it here. Exact same behavior on 2 different model 4K Vizio TVs running their SmartCast smarttv software. After launching youtube app, press vizio button on remote to return to the smarttv menu, once in awhile, a column of bad pixels will show for few seconds on the left hand side.
It seems the vizio software is reinitializing hardware when returning to the smarttv menu. In general, SmartCast software isn't very good. Also will randomly (relatively infrequent) get no network connection when on wifi and require reboot....
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