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I was surprised to see AC voltages coming from pin 13, could this be the issue a bad power supply? What would you recommend changing the Power Supply, Mother Board or both?

Visio TV Model, E390i-BO Power supply board, 0500-0614-0420 Mother board board, 3639-0142-01504A No power light or nothing, the TV is completely dead. Checked the ceramic fuse, it was good. Note there were no changes in the readings after pressing the power on button to the TV on. With the power connected, I checked all voltages at the power supply and at the main board. I've listed those readings and there descriptions below. Power Supply reading, Pin # & Description, Mother Board reading, as follows. 9v DC, #1. 19Vab, 9v DC, 9v DC, #2. 19Vab, 9v DC, 0, #3. G, 0, 0, #4. G, 0, 0, #5. G, 0, 32v DC, #6. PS on, 32v DC, 0, #7. Blu on, 0, 8 to 13v DC, #8. P dim1, 4 to 9v DC, 8 to 13v DC, #9. P dim2, 4 to 9v DC, 6 to 10v DC, #10. P dim3, 4 to 9v DC, 3 to 10v DC, #11. P dim4, 4 to 9v DC, 8 to 10v DC, #12. P dim5, 4 to 9v DC, 1.8v AC, #13. P dim6, 1.8v AC.

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5 Related Answers

Anonymous

  • 1 Answer

SOURCE: FAULTY POWER SUPPLY FOR LITE ON PS -5251-2DS

when connected the AC power , no DC voltage reading from the p.s.

what to do?

how can i turn it on?

Posted on Nov 24, 2008

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Anonymous

  • 46 Answers

SOURCE: Computer will not turn on. Possible power surge.

If the power supply is good then your motherboard must have gone bad during a surge.

Posted on Dec 27, 2009

Testimonial: "Thanks for the quick response!!"

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spr1949

Parasuraman S

  • 1182 Answers

SOURCE: Power supply board troubleshooting - p50x01au

If you have a service manual, please match the voltages as per that and problems might be in areas where these do not match. But read on what condition these voltages are to be checked, this is usually written in a service manual, i.e, without any signal or feeding some signal etc.

Posted on Aug 06, 2012

SOURCE: Vizio 42 in L42HDTV10A no power no lights no nothing

You can look at the various module failure symptoms and service / replacement options for the L42HDTV10A here:
http://www.coppelltvrepair.com/search?Q=l42hdtv10a&As=false&Pf=&Pt=&Sid=false&btnsearch=Search

Posted on Apr 25, 2013

me02450

EMCS Engineers

  • 78 Answers

SOURCE: Tv cycles on to LG logo and back off continually when plugged in.

bad power board

Posted on Dec 11, 2015

Testimonial: "Ordered a complete set( main,power and logic board) for just about $30 dollars more than just power board. Waiting for it to arrive to see which component is bad. Will inform @ later time"

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Hello. I have a Samsung 65" 4k TV ( UN65F9000). And have a no power issue or power issue. The screen got wonkey and then went black and now only clicking from PS Board. Removed back panel and...


First off 3.2 is the correct voltage for the PSON so we know the main board is sending the signal back to the power supply instructing it to come out of sleep mode and go to work, if your other power supply voltages are ok then you can rule out the power board. A gut feeling is you have a bad main board but its only a guess without doing some testing on the TV...you said you don't have sound, is that because you can't tell what input the set is on?...also have you tried the flashlight test?

Mar 21, 2018 | Samsung Televison & Video

1 Answer

Sony KDL40EX500 power supply. Board has standby power but other voltages don't come up. Tried shorting "Power On" pin (pin 13) to "STDBY3.3V (pin 15) to try and get the board to power up but nothing.


If You do not see any open link or resistor, short IC or transistor on power supply it must be a control board problem. You must get the set to SONY, as it is necessary to exchange board and upgrade software.

Oct 12, 2013 | Sony KDL40EX500 40 in. HD-Ready TV

1 Answer

Dead set (no indication lights coming on when I push the power button.


Hi Gwendolyn,

First of all thank you for posting your question here at Fixya.
I'm assuming here that you're TV is a Vizio L32 HDTV.
My initial advice is to ensure that the AC source(outlet) is live. Please plug the unit to a known working outlet, if you are using a surge protector, directly plug the power cord of the TV to the outlet to confirm that the AC source is not the issue here.
If you've confirmed that the AC source is not the problem, then the fault is inside the TV and most likely the power supply. Most of the TV with a dead set symptoms that I've encountered is a power supply issue but of course needs to be confirm.

If your unit is not under warranty period (if so, avail it because the manufacturer will fix it for free, opening the rear cover will void the warranty), open the back cover, check the internal fuse of the power supply board, this is near where the AC power cord's directly connected. Check its continuity using the multimeter/ohmmeter, if you found it open, replaced it with a new same current rating that is printed on its body itself. Sometimes internal fuse fail due to voltage surge/flactuation, aging, etc, replacing with new one resolve the issue, however if the fuse blow again, this is an indication of more serious problem on the power supply board, it needs to replaced the entire board.
If the fuse is intact, you have to measure the output voltage of it through connector J1 (pin 9,10,11). You should be getting 5 Volts. If there's no voltage at these pin, you're power supply board is dead, replaced the entire board. If the 5 volts is present, replaced the main board.
I've provided you a links for the power supply board and mainboard below.
Vizio L32 Power supply board

Vizio L32 Mainboard

Let me know if you need further assistance.

Rating and feedback are highly appreciated!

Hope I helped you.
Good luck and take care!
Have a nice day!
Kind Regards,

Jdvillanueva

Dec 13, 2011 | Vizio L32 32 in. LCD HDTV

1 Answer

I want to convert this power supply for use with a battery charger for model aircraft. I need to know the color codes for the wires and also the pinout and which wire is the power on.


Pin Name Color Description
1 3.3V Orange +3.3 VDC
2 3.3V Orange +3.3 VDC
3 COM Black Ground
4 5V Red +5 VDC
5 COM Black Ground
6 5V Red +5 VDC
7 COM Black Ground
8 PWR_OK Gray Power Ok (is a status signal generated by the power supply to notify the computer that the DC operating voltages are within the ranges required for proper computer operation)
9 5VSB Purple +5 VDC Standby Voltage (max 10mA)
10 12V Yellow +12 VDC
11 3.3V Orange +3.3 VDC
12 -12V Blue -12 VDC
13 COM Black Ground
14 /PS_ON Green Power Supply On (active low). Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF.
15 COM Black Ground
16 COM Black Ground
17 COM Black Ground
18 -5V White -5 VDC
19 5V Red +5 VDC
20 5V Red +5 VDC

/PSON activated by pressing and releasing the power button while the power supply is in standby mode. Activating /PSON connects the power supply's /PSON input to ground, thereby switching the power supply to full-on condition.
18 AWG is recommended for all wires except pin 11, which should be 22 AWG. For 300W configurations 16 AWG is recommended.
There are several ATX variants.
Hope this helps.
If this helps you resolve your problem, please
consider giving me a rating of 4.It will help me as well. Thank you.

Nov 26, 2010 | Compaq (243890-001) 250-Watt Power Supply

1 Answer

I am trying to troubleshoot whether or not my ultra x2 connect 550 watt power supply is bad. When you press the power button on the computer, the light flashes and then noth9ing else happens. The light...


Well here is a way to check your power supply, on your hard drive connector using your volt meter and measuring from ground. this would be using one of two middle connectors it should measure +5 VDC on the red wire and + 12 VDC on the yellow wire. If these voltages are good then we got to see if the power supply is producing the -12VDC voltage. This voltage is ussed by the syustemboard on pin 14 of a 24 pin power supply. I would recommend not having your system board plugged in while measuring these votlages, but the power supply may need a load, I would plug in the cdrom.. Below are a couple of picture to explain this and a link to a website that has this documented.

http://www.playtool.com/pages/psuconnectors/connectors.html

dfish26_1.jpg The 24 pin main power connector was added in ATX12V 2.0 to provide extra power needed by PCI Express slots. The older 20 pin main power cable only has one 12 volt line. The new 24 pin connector added one line apiece for ground, 3.3, 5, and 12 volts. The extra pins made the auxiliary power cable unnecessary so most ATX12V 2.x power supplies don't have them. The 24 pin connector is polarized so it can only be plugged in pointing in the correct direction.
Pinout Pins 1 through 12 Pins 13 through 24 Description Wire color Pin number Pin number Wire color Description +3.3 volts orange 1 13 orange +3.3 volts +3.3 volts orange 2 14 blue -12 volts ground black 3 15 black ground +5 volts red 4 16 green PS_ON# ground black 5 17 black ground +5 volts red 6 18 black ground ground black 7 19 black ground PWR_OK gray 8 20 white -5 volts (optional) VSB +5 volts purple 9 21 red +5 volts +12 volts yellow 10 22 red +5 volts +12 volts yellow 11 23 red +5 volts +3.3 volts orange 12 24 black ground
Good Luck I hope this helps.

Nov 19, 2010 | PSA Ultra X2 Connect (ULT31851) 550-Watt...

1 Answer

No power of lights or any movement on my HP PSC 2400 Printer. When i check the power supply unit it has the voltage on the end pins.


Since there is voltage coming from the power supply try your printer in a known working ac outlet.

If your still not getting power then that means the main board inside of the printer is bad.


Dec 18, 2009 | HP PSC 2410 All-In-One InkJet Printer

1 Answer

The LED on my HIPRO D3057F3R power supply is illuminated but the fan does not run. Does this mean that the power supply is bad?


Yes, it does.
More than likely Electrolytic Capacitors, have gone bad in the power supply.

Electrolytic Capacitors are used in the Input, and Output stage of the HiPro power supply, as Filters.

In the Input stage they filter the incoming AC voltage.
In the Output stage they filter the rectified AC.

(AC is rectified into DC. The capacitors are filtering DC at this point.
AC = Alternating Current
DC = Direct Current
A flashlight battery is an example of stored DC)

The HiPro power supply you have produces three main voltages. Three voltage Rails.
A.3.3 Volts
B.5 Volts
C.12 Volts

When Electrolytic Capacitors go bad, or are failing, there is a weak voltage rail.

HiPro power supply's are cheaply mad.
1.The wiring is too small. (The gauge of the wire is below standards)

2.The Electrolytic Capacitors are of low quality.

3.The rectifier bridge has cheap diodes, and too small of a heatsink.

I could go on, and on.

When you have a power supply with a weak voltage rail, there is not enough power for the Processor.

1.ALL the lights use less than 1 Watt.
2.EACH fan uses 2 to 3 Watts.
3.A typical Processor can use 55 to 125 Watts!
[Depends on what processor it is.

This is why lights - light, and sometimes fan's will spin, but the computer won't run.
Not enough power for the Processor.

Solution?
Replace the power supply.

Viewing this link,

http://www.pcmarketusa.com/product_view.aspx?product_ID=18498

,you can see the HiPro D3057FR3 power supply has just the usual ATX shape, and size.
The ATX 'Form Factor' power supply, is used in approximately 90 percent of computer towers.

[Form Factor usually denotes towards a motherboard. An ATX form factor motherboard is 9.6 inches by 12 inches. Form Factor means the size, and shape.
The Form Factor designation, has been used towards certain hardware parts in a computer, as well as the computer case, but this is erroneously used. It does make it easier to identify with, though. That's why I used it here]

Point I'm getting to?
1.See if you have another Known, GOOD, ATX power supply to use for a test. Test my statements above before you go out, and buy another power supply.

Do you have another computer that has a good power supply, but may have other issues, that you can borrow the power supply out of, to use for a test?

Another thing. This manufacturer overstates the actual rated Wattage. The actual wattage is more like 70 percent of what is stated.
They state 300 Watts - Maximum, but in reality it is more like 210 Watts.

It is for this reason, and the reason that components used in the above power supply are cheap, that I would recommend buying a different power supply, than buying another HiPro.

(Therefore,.NO, I do not recommend the one in the link above, as a direct replacement)

What power supply that fits your needs would I recommend, that is a decent quality power supply, and won't break the bank?

This one,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4675269&CatId=106

OCZ StealthXStream 400 Watt.
Why?
Because it has 80 percent of the true rated wattage.
320 Watts actual.
Because it is reliable.
Because it has all the power cables you need.
Because it is $28 USD after the rebate.

I'm sticking my neck out recommending a particular power supply here, as this goes against our TOS, but if you have no background in this area, how are you going to know what to look for?

I am not recommending the website. But I have used them repeatedly, and always to my satifaction.

Any questions?

Nov 27, 2009 | Hi-Pro (HPP303W) 300-Watt Power Supply

1 Answer

Tv turns on for one second then turns back off


I believe it is a Back Light failure. Either because of a bad Ballast, a Power Supply, or a bad Lamp that is not replaceable. If it is a bad Ballast or Power Supply they are replaceable. Checking the Voltage from the Power Supply for the Ballast will tell if the Power Supply is bad. It should read around 250V to 300V.
If the Voltage is there, the LCD Panel will probably need to be replaced. I recommend a professional to evaluate it to be sure.
I hope this helps,
Skyassoc

Aug 25, 2009 | Sony BRAVIA KDL-40S2000 40 in. LCD HDTV

1 Answer

Power supply


ATX Version 1.2 - 20 wire motherboard connector Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10 3.3V 3.3V Gnd 5V Gnd 5V Gnd P_OK 5VSB 12V Oran Oran Blk Red Blk Red Blk Gray Purp Yell Oran Blue Blk Green Blk Blk Blk White Red Red 3.3V -12V Gnd P_ON Gnd Gnd Gnd -5V 5V 5V Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 Pin 17 Pin 18 Pin 19 Pin 20 The color scheme used for the voltages in the 20 pin connector holds for the other ATX standard power supply connectors. However, brand name manufacturers often build proprietary power supplies or make up their own color coding, so I wouldn't throw out a power supply that supplies 5V where you think it should supply 3.3V. It's more likely a proprietary design than a failure.

Feb 21, 2008 | Computers & Internet

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