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Cracking and sparking coming from inside of 150s4 monitor case wiggle power cord monitor comes on will re soldering the power socket to the board fix this problem

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Yes, but you are dealing with potentially high voltages inside the case. The crackling and sparking are an open short that is being arced but the voltage.
This is one of those things that can be dangerous, so make sure everything is disconnected and that you leave the monitor unplugged for at least an hour so that all of the capacitors can "leak" discharge themselves.

Posted on Jan 05, 2009


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Posted on Jan 02, 2017


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32" Samsung TV picture not working

You could take the board out and look for a cracked solder joint on the board or a cold solder joint and repair.
Bad solder joints are very common in TVs and monitors due both to poor quality manufacturing as well as to deterioration of the solder bond after numerous thermal cycles and components running at high temperature. Without knowing anything about the circuitry, it is usually possible to cure these problems by locating all bad solder connections and cleaning and reseating internal connectors. The term 'cold solder joint' strictly refers to a solder connection that was either not heated enough during manufacturing, was cooled too quickly, or where part pins were moved before the solder had a chance to solidify. A similar situation can develop over time with thermal cycling where parts are not properly fastened and are essentially being held in by the solder alone. Both situations are most common with the pins of large components like transformers, power transistors and power resistors, and large connectors. The pins of the components have a large thermal mass and may not get hot enough during manufacturing. Also, they are relatively massive and may flex the connection due to vibration or thermal expansion and contraction.
To locate cold solder joints, use a strong light and magnifier and examine the pins of large components for hairline cracks in the solder around the pin. Gently wiggle the component if possible (with the power off). Any detectable movement at the joint indicates a problem. With the power on, gently prod the circuit board and suspect components with an insulated tool to see if the problem can be effected.
When in doubt, resolder any suspicious connections. Some monitors may use double sided circuit boards which do not have plated through holes. In these cases, solder both top and bottom to be sure that the connections are solid. Use a large enough soldering iron to assure that your solder connection is solid. Put a bit of new solder with flux on every connection you touch up even if there was plenty of solder there before.
press the helpful button and check video link

Repair cracked solder joints What is Dry or Cracked Solder Joint and how...

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1 Answer

I have a acer extena 4420-5239 that the dc jack inside has come loosa and will not make a connection to power up. Can that be fixed or is it connected to to board

Yes it can be soldered back onto the system board.

Symptoms of a broken power jack
1. If you wiggle the power cord or the AC Adapter connector on the back of the laptop, the power LED and battery charge LED start to flicker.
2. Battery will not charge in the laptop.
3. Laptop runs fine off a charged battery.
4. With the AC Adapter connected the laptop appears to be dead.
No power LED or battery charge LED activity.
5. Laptop randomly powers off without any warning.

If your laptop is out of warranty, then you can fix the problem by re-soldering DC-IN jack on the system board. If it

Dec 19, 2010 | Acer Extensa EX5620-4025 (LXE970X025) PC...

1 Answer


July 2010

I have 3x F1703 screens, which Ive had in store, due to the problems of powering up the panels. Basically as descibed here, panels would go out.

After reading this posting, I decided to strip the 3x Panels down, as I was going to dump them anyway, in the past fear of attempting to open the cases and breaking meant I never got around to attempting to fix.

The front face comes off with a bit of difficulty, via prizing open using a kitchen knife,,, with 3 panels I had practise, so do take car. Work from the bottom edge of your panel.

On opening, you have a secure backplate you have to remove by unscrewing 12 screws, this then allows you to flip over the panel and to get to the control boards.

My first screen was damaged, but this had a later Processor board but an earlier power amp board...I salvaged the amp board with torodial coils. then used this on the 2nd panel - this now works fine!

The 3rd Panel, is also a early 2003 model, but again has a slighly different amp board, Im going to have to canablise the boards from 2 panels to make one good one.

The POWER fault was FOUND TO BE none other than a loose soldering on the power connector to the amp board, the solder was cracked and only needs to be soldered!

thats todays job, re-solder the amp board power socket and hopefull 2 out of 3 panels will be working once more

Hope this has helped

Thanks for the article as its enabled me to fix 2 panels, with thanks to you all

Clive - in the UK

Jul 29, 2010 | HP Pavilion F1703 17" LCD Monitor

1 Answer

Monitor will come on but then will click off and on

Sounds like a bad connection on the inside of the power cord socket on the back of the monitor. If you feel confident enough to take the back off just remove the power cord, remove the back and then wiggle the pins inside the socket 1 at a time and look in the back of the socket at the same time to see if the wires are loose on the pins, or if the wires from the pins are loose on the circuit board. May just need resoldering. If you can find out what it is it could save you money getting it repaired, unless you can do it yourself.

Feb 02, 2010 | Compaq FS7600 17" Flat Glass Monitor

1 Answer

Hi, I've had a mk 928 keyboard for my son, and he's somehow banged the mains lead, where it goes into the back of the keyboard. The keyboard only comes on now if you hold the cable in the back. I've taken...

The connector for the power on the circuit board has broken the solder connections OR cracked the board in the area.

Resolder the connector and if you see cracks that are breaking circuit traces on the board, one bridges around them with wires to repair.

You likely only have to resolder the connector in your case.

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2 Answers

A bad connection between the power jack and the

What needs to happen is on the motherboard underneath the power jack, there are solder points that have hairline cracks in them. The best way to fix it is to remove the motherboard from the laptop and to resolder all the solder points for the power jack.

Once you do this then the power should stay on cause wiggling the power cord won't cause the laptop to turn off.

Aug 10, 2009 | Toshiba Satellite A205-S4707 Notebook

1 Answer

19' Westinghouse Monitor - Intermitent come on.

The problem is either with the power cord itself (especially if it is connected to the monitor such that it stays bent all the time), or the problem might be with the socket into which the power cord plugs in the monitor. The solder joints fixing the power socket to the circuit board & connecting the power terminals to the circuitry usually tend to get loose after some period of usage either due to mechanical stress while connecting/disconnecting the power cord to/from the socket, or due to high currents passing through these joints continuously.
My suggestion is to test with a power cord which is known to work without problems. If this did not fix the problem, then the monitor will need service (monitor needs to be disassembled to a degree that permits re-soldering of the power socket's terminals to the circuit board).

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1 Answer

Power to Screen but does not come on. Wiggling

It sounds like there is a cold socket on the internal power input of your monitor. Have a repair technician take a look at it. It should be relativley cheap fix if that is the case.

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Either the power cord is bad or the connections to the power jack inside the radio are disconnected or broken. Easiest thing is to try a new power cord, if it doesn't help have a radio tech check out the unit. This should be a very inexpensive repair, usually under $20.

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Screen blacking in and out

Hi Esdee, Don't be too surprised if the monitor is having problems. The fact that it does the same thing on another PC is pretty good proof that is in fact the monitor. As far as what is going on the green power LED going on and off in conjunction with the blackouts indicates a power problem to me. - Does wiggling the power cords, plugs cause any change? - When the screen blacks out shine a flashlight on the screen and look to see if you can see any faint images. If you do then you have a backlight problem. If none of this works any further troubleshooting really requires some experience working around electronics and high voltage. Let us know how you want to proceed, as as always please don't forget to rate this posting.

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