Tip & How-To about MPC Computers MPC F1760I 17" FLAT PANEL Monitor

Common Electronics problems (1)

Sometimes our electronics appliances like TV monitor, radio or any other stuff may have a very simple problem. If we are not aware of this then we go in circles looking for the problem.
Technicians sometimes refer to this as intermittent problem. Sometimes the system will work and sometimes it will not. A tap/knock may get it working or will stop it from working.
Dry-solder joint is one of the causes.
If you are a novice and have no idea about electronics and how to work with soldering irons and electricity; please get assistance from a professional.
1. Switch off power.
2. Open the system up.
3. Discharge components which might hold charge to avoid electric shock.
4. Look at the bottom of the printed circuit board (track side of the PCB). You might need a hand lens for a closer look.
5. Look for cracks in the soldered components. Sometimes shaking components easily helps in identifying these cracks.
6. Once you get to know this, get your soldering iron, remove the old solder and re-solder the component.
7. You might be agitated to switch on and check your system at this point in time. Don't!!
8. Try and look for all the dry solder joints.
9. Fix as much dry solder joints as you can find.
10. Clean your board. Use isopropyl or general purpose thinner.
11. Double check the track side. There should not be any shorts that you may accidently done while soldering.
12. Once you are sure all is safe, assemble the system.
13. Connect a series lamp to the system and switch on to check.
14. If the problem stops; good for you. If it persists then continue looking for and treating dry solder joints.

I will share more on series lamps in my next tip.

Enjoy
Rjn

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I need a replaqcement trqansformer for my Starlogic monitor model # HD20W) the transformer is 120V -!2v 5A. Thanks for youyu help.


If the transformer puts out a simple 12 Volts regulated at 5 Amps, you should be able to go to any electronics parts distributor and order a regulated power supply at the mentioned specs. There are models that come enclosed with terminals on them. You can also buy the supply raw, wire the AC cord to it, get an enclosure for it, and wire the the 12 Volt output side to the TV as necessary.

If you are not experienced at doing this type of work, find an electronics type person to do this for you. If you confuse the polarity to the TV set, or not select the proper power supply, you can damage the TV set.

These power supplies are not very expensive. A new low cost one can cost about $60 to $80 US depending on the model type and rating. Professional high quality type supplies can cost a lot more.

Sometimes these supplies can be found slightly cheaper from electronics parts surplus dealers. I have seen them sold surplus for under $20.

Jerry G.

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Red light blinks5 times stops & does it repeatly sony KDF-60WF655


5 times red light blinks in Sony KDF-60WF655 shows problem with ballast supply that needs to be replaced.
If you are handy with electronics stuff repair and have service manual copy then can replace it.
Be Aware: electric shock risk is involve in TV repair.
Or contact local TV tech to fix it.
Need further help, let me know please.
Thanks.

Sep 22, 2009 | Sony Grand WEGA KDF-60WF655 60" Rear...

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Dell 1800FP monitor. Will not power up at all. Checked power cord on another machine, works fine. Monitor is from 2002, but was working perfect till yesterday. Is this worth fixing?


Take it apart and check the fuse. Sometimes is just a simple component damaged.
Have it checked in a specialist electronics house if you prefer.

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1 Answer

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Most cases with this problem, it's a power supply RELATED problem. It maybe something simple like a blown fuse on the board. Electronic stores like Radio Shack will carry fuses for the TV. If the fuse isn't the problem, we're talking about a bad capacitor or transformer on the board.
If you have some electronic experience, you can sometimes find a repair manual over the internet for less than $20. It mostly called a Service Manual. It will have diagrams, schematics, and part numbers for the TV.

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This monitor is worth $30.00. Trash it. http://www.etech4sale.com/IBM_6549_4AN_G96_19-Inch_White/G96/partinfo-id-119721.html

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