Tip & How-To about Audio Players & Recorders

How to clean electronic equipment

  • Unplug any cables or power cords from the electronic equipment before working on them. Remove any component cables leading to other devices.
  • 2 Wipe down the electronic equipment with a soft damp cloth starting at the top of the device and working downwards. Wipe away any accumulated dust, lint or dander.
  • 3 Use a small amount of isopropyl alcohol on a soft cloth to remove fingerprints from any CDs or DVDs. Work from the center of the media outwards. Do not rub too hard or in a circular motion.
  • 4 Clean a LCD television or computer monitor screen by wiping a damp cloth gently across the screen once all power is disconnected. Wipe down the ventilation area to remove any dust. Clean the base with the same cloth.
  • 5 Open a computer case by removing the screws that hold the side in place. Blow dust and debris from the interior with a can of compressed air. Start at the power supply and blow through the rear ventilation fan. Continue to dust the motherboard, component slots and case.
  • 6 Insert a compact disc cleaning disc into CD and DVD players to better clean up these electronic devices from the inside. This cleans the interior lenses, removing dust accumulation that can lead to early device failure.
  • 7 Rub down an MP3 player with a soft cloth and a small amount of ammonia-free glass cleaner. Use a cotton swab to get into crevices and hard to reach areas that trap debris.
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    1 Answer

    Red vertical line on the screen due to external shock

    This is most likely caused by the cable on the T-CON board being bent out of place by the shock.
    If you know how to work on electronics or have a friend with knowledge/skill you can fix it.


    REMOVE THE PLUG FROM THE WALL. REMOVE INPUT signal cable from set.
    >Lay the set down on a flat cloth covered surface.
    >Remove the back cover.
    >Remove the shield covering T-CON board. This small board is located in the center near the top.
    >Move the cable(s) connected to the T-CON around.
    > Set the tv upright and make sure it is stable.

    ATTACH INPUT SIGNAL cable to set.
    >Use the remote to turn the set on. If the vertical lines are gone, THEN TURN the set OFF.
    REMOVE THE POWER CORD FROM THE SET. Remove signal cable.
    > Lay tv back down on table.

    Replace the back cover etc.
    Now you can reconnect the input cable and power cord.
    SOMETIMES THE IMAGES can get worst and you have to repeat moving the cable around. In the worst case you can dis-connect and re-connect the flat cable WITH THE SET UNPLUGGED.

    I believe the T-CON may sometimes be called LVDS and look similar to;


    Feb 15, 2011 | Sharp Aquos LC52XD1E 52 in. HDTV-Ready LCD...

    1 Answer

    can a treadmill not work because the shed its housed in is too cold ?

    If in a shed I would unplug unit remove motor shroud inspect the motor compartment for moisture or rodent by products causing corrosion or burning any components on the motor control board then replace the board. Check all connections leading to the board. Use a multi meter to see if you are getting AC to the unit if you are but do not get any DC readings on cable ribbon leading to upper electronic console usually 5vdc then replace the lower board.

    May 13, 2010 | Reebok 8050 ES Treadmill

    2 Answers

    no power

    Disconnect your power. Remove the batter (CMOS), unlplug the power cable harness to motherboard. Plug in your main power cable cord (to power supply) then carefully plug the power cable harness to motherboard while simultaneously holding the power switch on computer down. Be sure sweaty palms are not touching the motherboard. power leads, or any other items as not to short any components.

    Happy Computing!

    May 05, 2009 | Computers & Internet

    1 Answer

    Push the on button and nothing happens

    I believe you are using a new power supply now.
    Before you start, first check if your Power button is OK.

    To do this, first unplug the power cord from your PC.

    Remove POWER-Button connector (with black/white or blue/white wires) from you Motherboard
    Remove RESET-Button connector (with black/white or blue/white wires) and put it on the place of POWER-Button. (polarity for these buttons is not important)
    Plug the power cord back and press RESET.
    Does it change things ?
    If it starts, then your Power-Button is broken.

    If not, remove the power cord and then put te POWER-Button and RESET-Button on their places on the Motherboard.

    Now do the following:
    (please remember the position and polarity of all cables/items you remove/unplug, Use Digital camera if necessary). Be patient, don't hurry!
    - Unplug the power cord.
    - Press power button few times (power cord is unplugged).
    - Remove the Battery.
    - Unplug the Monitor cable and remove VGA card.
    - Remove RAM module(s).
    - REMOVE any PCI cards(Modem. Lan, Audio etc.).
    - Unplug any HDD/FDD/DVD cables from the Motherboard.
    - Unplug Power from all your HDD/FDD/DVD devices.


    - Put the batery back (be careful to the polarity)
    - Put the Computer power cord
    - Turn on your PC.

    Is the Processor Cooler running ?
    Are there Beeps from PC Speaker?

    If not, then your Motherboard is broken !

    If there are some beeps, then your Motherboard is OK, but some component(s) is broken.
    Turn Off your PC by pressing the Power button for about 4 sec.
    Unplug the power cord and press Power button few times.
    Put your VGA back, and connect the monitor cable, too.
    Put back ONLY ONE memory module (if there are more).
    Connect the Power cord and press Power button.

    Do you have a picture now ?
    Are there Beeps from PC Speaker?

    If you have a picture, put back all other memory modules and PCI cards, connect Data and Power cables to your HDD/FDD/DVD units, but ONE at TIME.
    Do not connect and put everything back all at once!
    After each change, see if there is a Pcture and (one) beep.
    It needs some time but that's how you will detect which device/cable is maybe broken!
    And remember:
    Before you do any change, AALLWAYS do that with power cord unplugged and power button few times pressed !!!
    If there are Beeps, try another memory module.

    Again if there are still beeps, you have problem either with your RAM or VGA.
    If there are infinite long beeps, than it is your RAM.
    If there is one long and many (8) short beeps, then it is your VGA

    Replace it!


    Mar 23, 2009 | HP Computers & Internet

    1 Answer

    Loud Hum in Pinnacle 150 subwoofer

    The hum is likely due to either a failed capacitor in the subwoofer power supply or as it was for me, a cold solder joint on the capacitor. The fix is simple, but does require soldering. Unplug the subwoofer and set it on a good working surface. Remove the screws holding the back panel to the cabinet. These screws are the ones near the edge of the panel. Take off the panel by pulling back on it, reach into the subwoofer and carefully unplug the red and black speaker leads noting which one goes to each connector. Orient the panel with the electronics side up and the power cord at the lower right of the panel. Just to the left of where the power cord is soldered to the board is a large cylindrical capacitor. It is by far the largest cylidrical component on the board. This capacitor filters the hum made by the step down transformer in the power supply. If the capacitor is not working the subwoofer hums. The capacitor is soldered to the back of the electronics board. We had to reach in with a modified soldering iron to remove the capacitor. Before removing the capacitor check the orientation, there is a plus and minus, make sure it goes back in the same way. After removing the capacitor inspect the capacitor leads to see if they were both soldered correctly. If one of the leads is not silver the most likely cause is a cold solder and the fix is to simply clean up the capacitor leads by scraping off anything that is not silver, tinning the capacitor leads and re-soldering it to the board. If the leads look like they had a good solder, test the capacitor by using an ohm meter (used to test resistance) between the capacitor leads. The meter should show low resitance and as the capacitor charges the resitance should go up to infinite. If the meter does not behave this way while testing the capacitor, replace the capacitor. Bring the old capacitor with you to the electronics part store to make sure you get one that has the same electrical properties as the one you are replacing. The form of the capacitor might be different but as long as it is has the right electrical properties it will work. - and don't foget to make sure the polarity is correct when you solder it in!

    Nov 06, 2007 | Pinnacle PS Sub 150 Subwoofer

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