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Soniq qv321lh has no power

There is no light on in the front. power gets to the board but on all output pins there is no voltage Eg 12v,5v, 24v nothing looks fried but who knows??

Posted by Anonymous on

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4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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budmrtn
  • 11361 Answers

SOURCE: When plugged in, the logo flashes white.

The 5vdc standby is working but not the 12 or 24v?
You need to find out if the power supply board is getting PS_ON signal from the main board to turn on the 12/24vdc power supply section.
Please read my guide to get some understanding first.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com just make sure to use caps with low ESR, 105c rating such as PANASONIC FM or FC series.
Please post back what you find.

Posted on Dec 06, 2010

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  • 1 Answer

SOURCE: ILO LCD, Power supply issue, MLT169B. 24v output is dead.

I want to know R3 value

Posted on Dec 27, 2010

gopakumarg43
  • 74459 Answers

SOURCE: Power supply problem

The power supply board is faulty. Should be replaced. What is the brand name to your TV? Provide more details please. If you wish to get more details, check this site linked below. Pull up older posts there. Check the site with patience, as it has over 2350 posts now. All are related to electronic equipment repair help. If you search the site in Timeslide option, which can be selected from the drop down list at the top left of the display window, it will be easy to locate the related post. You can also do a search by type in the brand name to your device into its search box at the top right of display window.
http://electronicshelponline.blogspot.com/

Posted on Apr 30, 2013

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1 Answer

PHILIPS TV 42PFL3604/12 not working. Power Led lights up white but no backlight working and no picture


Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Aug 25, 2015 | Philips 42PFL5332D 42 in. LCD Television

1 Answer

Vizio logo does not light up amber when plugged in but turns white when power button is pressed. no picture or sound. Big Transformer on power board makes a light buz sound when plugged in also.


1. When the TV powered up, please measure the 24V, 12V & 5V are there, if one voltage is missing, you may have a defective power supply.

2. If the power supply lost the 24V source, you may unplug the power supply connector on both the inverter board, then power it up, if you got the 24V back, you do have a defective inverter board, you may unplug them one at a time to locate the bad one.

3. If the power supply & inverters are good, you may have a defective main board. The common problem on the main board is that a voltage regulator is bad, you may use your millimeter to measure them 1 x 1. The out put voltage (on the heat sync) should be 1.25V + the control voltage (Pin 1), for example: if the control pin voltage is 0, the output voltage should be 1.25V, if the control voltage is 2.05V, the output voltage should be 3.3V, if one of them is out of range, replace it, you may find the part from Digikey Co. The part number printed on the regulator is AMC1117.


Good luck!

Apr 08, 2015 | Vizio VX42L 42 in. LCD TV

1 Answer

Getting 120 v to white plug where it first plugs into board should i have power reading at fuse?


yes after to the fuse you must have a reading of 120vac if none the fuse get busted. if the 120v is present then it will goes through the rectifier bridge diode and primary capacitor of the power supply board to have an stand by voltage at the power supply board. when you press the power button it will send signal voltage coming from the main board to turn on the power supply board. the you will need to get an output voltage at the power supply board of 5v dc, 12v-16vdc and 24v to turn on the all the circuit, the main board sound amplifier and the inverter board for screen back light.if you can get those supply the tv unit will not turn on.

Nov 09, 2012 | Vizio L37 Television

1 Answer

Power but no picture


you need to check weather the power supply has complete output dc voltages 5v stand by, 5v detect 12v-16v for audio and tuner and 24v for back light. if just only an stand by voltage, the cause is either the power supply failed or the main board detect an error in the inverter board .

Jul 26, 2012 | Samsung LE32R41BD 32 in. HD-Ready LCD...

2 Answers

Power light is blinking and the tv won't power up.


In that case the problem of your television is the power supply.The power supply have low voltage output so that the board of your TV cannot drive,so that the TV wont turn on.The power supply have leak capacitor that may cause of abnormal voltage.The output voltage of the power supply is +5V, +12V, and +24V.So the power supply is the problem its need to repair.Thanks

Aug 24, 2011 | Panasonic Viera TH-42PZ80U Plasma TV

2 Answers

37 inch vizio has black screen. the vizio display


L37HDTV10A THE TV ON NO VIDEO NO MENU SAON OKEY

Jan 16, 2010 | Vizio L37 Television

1 Answer

No picture; dark screen. Red light turns to green when power button pressed. no picture from any input. Inverter?


I would check output voltage of the power supply first to make sure that you do have DC 5v, 12v, and 24v. If you do then the problem can be in the inverter board. The inverter board also has a couple surface mounted fuses on it. You can check www.shopjimmy.com for parts.

Jan 05, 2010 | Polaroid FXM-2611C 26 in. LCD Television

1 Answer

Fuse and power supply look ok to the eye slight static sound on audio tiny flash intermitent inright corner on video, any clues? power diods check good ,nothing looks hot or burnt There is a second board...


Your power supply on the dc output should have the floowing DC voltages, 5v, 12v, and 24v. Just start probing the connectors of the power supply. 24v is needed for the backlights inverter board, 12v for sounds, 5v for logic board.

Dec 09, 2009 | Audiovox FPE3206 32 in. LCD Television

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