Question about Vizio SV470M LCD TV

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I have no power,power cord is good, removed back covers and found a burnt 6 leg chip on the main board #dk10 is attached to a heat sink, can i just replace this part?

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

lovejoy91
  • 691 Answers

SOURCE: I have aVizio VX42L HDTV10A. was watching a show

This means you have a dead short, It is probably a Diode in the power supply area, but without testing board you don't know. If you know basic electronics, i would say check all diodes in power supply and look hard for something burnt and replace that also. Or just replace power board, check shopjimmy.com

Posted on Dec 08, 2010

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SOURCE: My VP504fhdtv10a vizio plasma TV when connect

Logic Control D Board got nothing to do with this problem. This is your main power supply gone bad(usually not the sub power supply). I just repaired my VIZIO by replacing main power supply. Just remove back cover and your board will be right in the middle of the screen. Just get board part/serial # and google it. My best price was through eBay(around $100). Everything is fine now.

Posted on Feb 07, 2011

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SOURCE: Visio VO420E, The left side of screen has a 6 inch wide group of colored lines, I removed the cover and the lines are directly in front of the main circuit board area (not the power supply board). Do

Lines like that are almost always a bad LCD Panel, but just to test...

Bring up an onscreen display (setup menu, volume bar, etc.) that originates from the TV ITSELF, not your cable, satellite, etc. You need something that intersects the area of the screen where the lines are.

1) If the lines are through the onscreen items as well, then it is a problem with the LCD panel. It sounds like you are fairly comfortable inside the set. First try to re-seat the ribbon cable(s) inside that are attached to the main board, insuring they are secured properly. See if that clears up your problem. If not, it's time for a new set.

2) If the onscreen items are OK, and it only affects the input source (tuner, HDMI, etc.) then it is most likely the main board that is having the problem. Replace that and you should be good to go.

Posted on Sep 15, 2012

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1 Answer

LG electric dryer is not heating. Electric coils test for continuity. Any suggestions?


There are several things that can prevent a dryer from not heating. UNPLUG DRYER BEFORE TESTING ANYTHING.
1- power- Test the receptical to make sure you are getting 220 volts. To do this you need and voltage tester. Both legs should pull 110 and together 220. If one leg is not pulling any power than your breaker is half tripped. Reset breaker to cure your problem. If problem persist it is in the breaker or receptical.
2- cord- To test this unplug dryer. Take the panel covering the cord connections off. Remove cord entirely from dryer. Test each leg for continuity. If any are not showing cont than replace cord.
3- Themal fuse- To test this remove access back access panel on some front panel. By the blower housing there is a fuse white thin sliver or round fuse with 2 wires going to it. The one with 4 wires is your low limit cycling thermistat. The thermal fuse is near that. Disconnect the 2 wires and check fuse for continuity. If meter shows cont fuse it good. If not replace fuse.
4- Hi Limit Thermistat- test same way as thermal fuse. On the heating element housing at the bottom are 3 wires running to a fuse. Test the left and right. The bottom is attached to one of the sides.
5- Thermal Cutoff- Test same way as thermal fuse. This fuse is near the top of the heating elemnt above the Hi Limit. 2 wires with usually plastic covers on them.
6- Heating Element- Below high limit 2 wires. Test for continuity.
If all these fuses are good than you may need to call a technician. The motor may not be getting to the right rpm to activate the senfrigrial switch in the moter. Timer or control board may be out.
7- Motor- If

Jul 16, 2011 | LG DLE2514 Electric Dryer

1 Answer

Code f70 . fuse is ok.what is next....


- if you've got any knowledge of takin these type of things apart then here goes. undo the six fixing screws (if it outs of warrenty that is).
what you'll see is a main board and a little pcb boad attached to the back in which the rca's are connected to. remove the screws that hold this in place and with a set of long nosed plyers gentlely close the plastic lugs so you can remove it ( also remove all wires as to remove it compleatly) if you look on this little board you will see 2 black chips that are next to each other. the 1 that stands out the tallest out of the pair CHECK IT FOR DRY JOINT (solder split ) as that 1 normally becomes loose and can move about (re solder it) and replce back. now on the main heat sink unit you have 2 amp chips. remove the screws and clean all heat sink compound. put new compund on and screw back ( these dont need removel if your gentle. replace the cover and see what it does
best of luck

May 27, 2010 | Technics SA-DX750 Receiver

2 Answers

Tv turned itself off. turn power back on, picture


Your TV is experiencing a convergence issue as indicated by the 3 blinks. The only way to fix this is replacing the convergence ICs. It is not a hard task to replace these ICs. You just need to know how to solder and work on printed circuit boards.

The convergence ICs are mounted on a large heat sink and are marked with codes starting with the letters STK and there are two of them. You need to replace both.

Look for the heat sink with two ICs mounted on it and check the markings.

Once found, cut the IC legs with a small side cutter and unscrew it from the heat sink. Remove the legs left soldered on the board.

Take note of the IC markings for ordering the right part and how it was installed. Don't forget to buy along with the IC a thermal compound.

Check the pico fuses on the same board. Most likely you will find a blown one. These fuses look very much like a resistor, not like the usual transparent fuse, and usually yellow.

Once you have the replacement ICs, put it on the board in the same way as it was installed before. Make sure the screw holes are aligned before soldering the legs into the board.

Put a reasonable amount of thermal grease/compound between the ICs and the heat sink and fix them with the screws.

Double check the board for any splash of solders that might cause a short circuit and damage the board.


Dec 07, 2009 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

Accidently knocked projector and it has got lines accross the picture about every inch or so when viewed on 6 foot screen lines go vertical top to bottom


first reset the settings to factory default. if the lines are still there, you'll have to reset the dmd chip board with the main board. this is a little indepth. if you are not comfortable taking things apart (almost completely) and successfully putting them back together, send it in for repair to an infocus repair center. if you can do it, here you go:

remove the 4 brass and 4 silver screws from the bottom and the 2 silver screws from the back. through the top vent on the back panel and using a flat head screwdriver, unclip the 3 clips holding the back panel on. once removed, unplug the 2 wire harnesses. remove the top and front panel. now unplug the large wire harness and remove all the brass screws on the 2 power supply boards (also the screw for the ground wire). there is a black clip in the middle of the larger power board. remove the boards. now remove the brass screws holding the metal plate on. unplug all of the plugs from the main board. remove the screws from the board. now, facing the rear of the machine, the main board is attached to the dmd chip board behind the lens assembly under the heat sink. do not lift the board up from the back, pull it back towards the rear of the projector away from the dmd board. now reinsert it all the way and replace everything you removed in reverse order. good luck!

Dec 02, 2009 | InFocus X1 Multimedia Projector

1 Answer

Screen replacement


someone gave me a maxent mx26x3 with the same problem. I took the back cover off, and then the metal shield covering the PC board. There is a green heat sink on the main processing chip. The heat sink was not making good contact. I slightly twisted and pushed the heatsink on the the chip, and the picture stayed perfect now for 2 days. I think the heatsink will eventually need to be re-glued on with thermal expoy glue. It will be a pain to remove and clean though

Nov 07, 2009 | Maxent MX-26X3 Television

2 Answers

I need a convergance chip but don't know where to get it


I learned today on my Mitsubishi VS-60621 (chassis VZ4) there are 3 convergence ICs (3, not just one as previously suggested), all 3 are STK391-020 located underneath the large heat sink on the upper right (as viewed from back of set), above the large PCB with the 6"x10" cover in the middle. The 3 chips are hanging upside down from their heat sink, have aluminum covers over them (so well hidden, it took me hours to find them, not knowing where to look), and the whole heat sink & chip assembly comes out by removing 2 screws, the front one must be accessed by removing the large lower front plastic cover and fiber-board piece behind it. Not necessary to remove the smaller plastic cover and control box above the big one. The big plastic cover has 2 large tabs on the bottom straddling the center post that will still hold it on once the screws are removed, gently pull down on them to release it. Not necessary to remove the glass doors, but probably safer to do so. Good luck!

Aug 27, 2009 | Mitsubishi VS-60621 60" Rear Projection...

1 Answer

Just a thought from Mechanic


Well, first your pa does not go thru your audio chip,take the cover off,with the radio circuit board down, the audio chip is on the right side-rail,the chip close to you, now turn it over and inspect it for cold solder joints,if you need to replace it you have to heat sink it with heat sink silicone, to remove it you need wire wick,it soaks up the solder,make sure you clean the old off with a paper towel,use 60-40 rosin core solder........hope this helps.....

Feb 05, 2008 | Cobra 25 LTD 40-Channels Base CB Radio

3 Answers

Ibook


may be damge in connector cable (moost probable chnce as it moving throuth hinge

Dec 05, 2007 | Computers & Internet

4 Answers

No picture just sound


Had the same problem, took the back off and found some bad soilder joints on two of the main circut boards. Re-soildered and appears to be fixed.

Nov 12, 2007 | Maxent MX-27X1 27 in. HD-Ready LCD...

3 Answers

No picture only everythings working fine


someone gave me a maxent mx26x3 with the same problem. I took the back cover off, and then the metal shield covering the PC board. There is a green heat sink on the main processing chip. The heat sink was not making good contact. I slightly twisted and pushed the heatsink on the the chip, and the picture stayed perfect now for 2 days. I think the heatsink will eventually need to be re-glued on with thermal expoy glue. It will be a pain to remove and clean though.

Sep 11, 2007 | Maxent MX-26X3 Television

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