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Repair manual with pictures

I am repairing the dc power plug by soldering back to the board...I need a free online manual to see where the boards, etc go onto the mother board...a shop took it apart to get to the dc connector and I am trying to put it back there any online repair manual available with pics? Just showing where the circuit board and etc go ? The computer works fine , just need to put it back together...Thanks Bill

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  • A Womans Computer Man
    A Womans Computer Man May 11, 2010

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Sound but no picture.

dc control on power supply (backlight inverter <> ledmatrixboard) t-con board almost is neccesary an service manual and first of all control the capacitors on capacitance leaking bulging and or leaking tops , control the fuse(-resistors) in the circuit and the solderings on active components soldering for potential islets .
Better to change capacitors to repair then other new circuitboard because of the customizing on capacitors can be mucht better to take them a little dc value max 6 to 10 volts higher then used capacitors as long as it size is matching.

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My dv2175ea power inlet faulty

Most power cord ports are soldered directly to the mother board. Open this one up and see if it is a separate part or not. If it is, you could probably just replace the small part, but my bet is that it would take an entire system board replacement.

Nov 12, 2012 | Computers & Internet

1 Answer

My DC jack broke what should i do.

I am assuming you mean the DC jack on the motherboard in your laptop?
You can repair it yourself, or take it to a repair shop and pay to have someone do it.
To repair it yourself, you'll need:
1) A new DC jack (though sometimes you can fix the broken one)
2) The disassembly guide to your specific model of laptop. Google the phrase "laptop make/model disassembly" and one should come up pretty quickly. Guides are generally step-by-step with pictures included, and putting it back together is just the reverse of disassembly.
3) A soldering iron and solder. 15-30 watts for delicated boards like a motherboard. Once you've pulled your motherboard out, You can de-solder the broken DC jack from the motherboard (if necessary) and solder the new one on. DC jacks are generally 2-4 solder points and fairly simple to press back on.

May 26, 2011 | Computers & Internet

3 Answers

Acer 6530 has problem with power connector on the laptop, the cord and power supply work fine. the connector is loose and is not working, how do i replce it?

It's called a the DC Jack, and you would have to take the laptop completely apart so you can get to the motherboard then De solder the old jack from the motherboard then solder the new jack on the motherboard. Finally you will have to re-assemble the laptop. If you are not comfortable doing this than I suggest you take it to a local repair shop for repairs.

Mar 15, 2011 | Acer Aspire 6530-5143 Notebook PC

2 Answers

Bad AC adapter port


The majority of HP laptops I've worked with have had the DC socket "on-board".

But, don't worry about having to replace the whole motherboard as you can now purchase an new DC socket for the laptop and solder it in yourself. Or you can just take the laptop to a reputable PC repair store and have them fit you a new DC socket.

This is a very common problem with all makes and models of laptops (except Apple Mac's) and i have replaced plenty of them.

Please post back if you need anymore help.


Jan 14, 2010 | HP Compaq Presario V2000 Notebook

2 Answers

Black screen but get sound. picture flashes every

This sounds like a power supply issue. TVs operate on DC current and therefore must have a power supply board to invert AC house current to DC as well as regulate the DC current supplied. Heat is created by this process and therefore certain components on power supply boards are prone to failure due to repeated overheating. I would suspect capacitors on the power supply board are failing so they are only able to store enough power to allow the video board to work every 30 seconds and then it shuts off again. You can replace the whole board but I have repaired these before for a few dollars and some soldering. 

Nov 29, 2009 | Sony KDS-55A2020 55" Television

6 Answers

Will not hold charge, touch power cord on back or move it any way and the computer shuts off, the third light bar on front of computer keeps flashing between red and green

DC Power Jack is bad, or it's solder connections to the motherboard.

To explain;
The DC Power Jack is the port you plug your AC adapter into. (Charger)

Your DC power jack Not installed looks like this,

(You can click on the photo to enlarge)

Looking at the jack in the photo, it is upside down in relation to how it actually sits, on the motherboard.
Those flat pins you see go down through the motherboard, and are soldered.

As I'm sure you know, your laptop uses DC electricity. (Direct Current. A flashlight battery, and your laptop battery are examples of stored DC electricity. The AC adapter converts AC electricity into DC for the laptop)

The round metal pin in the center is for Positive. It is the Positive connection. The outside round hole has the Negative connection. (For this jack I believe it is a flat strip of metal going down the side of the hole)

What you can't see is that the body, or outside shell of this DC Power Jack is composed of Plastic. Looking at the photo, look at the rear view of the jack. The view on the right of the photo.
That metal center pin is riveted to the flat pin. (Or Prong, if you wish)

Doesn't take too much of a bump, when the AC adapter plug is installed into the jack, to break the plastic at this point.

However your jack may not be broken. It could be cracked solder joints. Solder joints where those flat pins are soldered to the motherboard.

I apologize for being so lengthy, but unless you repair these babies, you may never know this information, and I thought I would share.

I wanted you to know what the problem is.
It is my belief without looking at this laptop, and based on many repairs, that your DC Power Jack has cracked solder joints.

Only a professional, competent, tech will know for sure when they go to repair it. If the above is the case they will re-solder the joints.

Repair cost? This cost varies from city to city, and country to country. I could only hazard a guess.

In my area it varies from $50 on up. (The cost of the jack online is about $9 should one be needed)
(The entire laptop needs to be disassembled down to the bare motherboard. {The LCD screen stays intact} Then work on the jack can ensue)

Nov 09, 2009 | Dell Inspiron B120 Notebook

1 Answer

Power button flashing but tv won't turn on

If the power light is constantly flashing even after you have unplugged the set for a min or two and the plugged it back in, the you will need to replace 4 capacitors on the "DM" board. The "DM" board is located under a metal shield on the left side looking from the back of the TV with the back cover removed. They are 1000 microfarrad and rated at 16 volts DC. Available from radio shack or just about any electronics part supplier. Once you look at the circuit board, you will see the defective ones, they will have the tops swelled up. You will need at least a 40 watt soldering iron, .032 solder, and "solder wick" to do the job. Make sure you get the polarity straight when instaling them. If this explanation is too technical, then call a repair shop and ask then how much to replace the 4 capacitors on the "DM" board.

May 17, 2009 | Mitsubishi VS-45607 45" Rear Projection...

3 Answers

Toshiba 57H81 Flashing Red Power Light, Blown Fused F850+F852

Solved by resoldering some solder joints!!!!!!!
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001

Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852

Symptoms January, 2009:

  • Upon turning on set I got flashing red power light and nothing else.
  • Removing plug for one minute and plugging in results in:
    • Audible click, steady red power light for 2 seconds then slow flashing red light
    • Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
  • Removing power cord for several hours and plugging back in made no change
    • Audible click, steady red for about 2 seconds then slow flashing red light
  • Possible related note: Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
  • Fuses F850 and F852 found blown

Repairs Made:
  • PD0074 DEF/CON Power Board
    • There are two main power supply capacitors in this set. They are C-809 and C-810. One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time. When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
    • Replaced blown fuses F850 and F852.
      • I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
      • Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
      • Used a fast blow 2 Amp for F852.
  • PD0073 SIGNAL Board
    • Re-soldered Q751 + Q752 STK392-110 Convergence Amps
    • Re-soldered adjacent pads that looks suspicious

Total Cost to Repair about $10
  • Twelve hours of my time over three days to research issue, disassemble set, make repairs, add fuse panel.
  • Already owned Service Manual and Circuit diagrams from a different 2004 repair.
  • Less than ten dollars at Radio Shack for fuses and fuse panel. Already had wires, etc.
  • Some solder. Already owned de-soldering tools, etc.
  • Visited both local authorized Toshiba factory service repair facilities. One said repair would have to include replacing Q751 + Q752 STK392-110 Convergence Amps with ST392-180, and realigning set for a total of $500+ and it would be more if they had to order a power board. NO THANK YOU! Other shop said $65 for site visit and $30 to make an estimate that could be applied to repair.

Jan 04, 2009 | Toshiba 57H81 57" Rear Projection...

2 Answers

Warreny over , fix it myself ?

I don't think you'll be completely happy with this, but I'm pretty sure the DC Jack (the power plug you broke) is soldered onto the power control board. This doesn't mean it's not repairable. I've done this with some good success in the past, but you might just want to replace this entire "daughter" board. HERE'S ONE on eBay for about $75, a lot less than the $200 for the mainboard or more for a complete replacement or repair. You could try to repair the DC jack and if that $12 fix fails, replace the entire Power Control Board (PCB). I think you should take it apart and check at least. It isn't that difficult if you have patience and the right tools. You'll need a "computer" or "electronics" screw driver kit and something like a credit card to help pry apart plastic pieces without scratching them. I also found this thread on NotebookReview that talks about doing what you want to. To see what the board looks like check out these pictures: eBay: 3680 mobo1 To pick up the DC Jack you'll need, check out eBay, they are around $12 shipped. HERE'S ONE EXAMPLE GOOD LUCK!

Oct 07, 2008 | Acer Aspire 3680 Laptop

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