magnavox 20"lcd model20mf251w/37 backlight issues?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • cadillacman
    Badcaps Veteran
    • Feb 2011
    • 524

    #1

    magnavox 20"lcd model20mf251w/37 backlight issues?

    magnavox 20"... picked this up tonight.

    They said the backlight would flicker and shut off after bieng powered on a few mins.

    Ive had it on and no problems yet, but should i be looking anything over?

    also the dvd player wont read discs, any tips or tricks there?

    EDIT been running awhile, backlight still going strong.

    going to pull the dvd part apart tonight and see if i can fix it up.
    Last edited by cadillacman; 03-02-2011, 09:08 PM.
  • cadillacman
    Badcaps Veteran
    • Feb 2011
    • 524

    #2
    Re: magnavox 20"lcd model20mf251w/37 backlight issues?

    the dvd is toast, oh well

    backlight still working. The caps looked good when i had it open. I did see some old liquid spill stains on the power supply, i suspect this guy spilled something and mabye at the time bieng it was damp it was shutting down the backlight.


    oh well, worked out for me. Best $20 ive spent in awhile.

    Comment

    • Dgtech
      E. Technician
      • Apr 2009
      • 1462
      • Steeler

      #3
      Re: magnavox 20"lcd model20mf251w/37 backlight issues?

      I'd open it up again and clean out the DVD drive. You might get it to work. If you dont clean the whole set out with alcohol, whatever is in there may be conductive and could break down the copper on the board as well as connections. You may not have problems now but they soon could come, worse too. Thats a good buy. Good luck with it.
      The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

      Comment

      • cadillacman
        Badcaps Veteran
        • Feb 2011
        • 524

        #4
        Re: magnavox 20"lcd model20mf251w/37 backlight issues?

        yeah i tried the whole clean the laser trick. if you google this model, everybody had had dvd issues. Oh well.

        been running it all day the last few days and its good.

        Comment

        Related Topics

        Collapse

        • triplefour
          UN65TU700DF picture and sound but no backlight. BL tests ok but repl. PSU didnt fix!
          by triplefour
          this tv is throwing me for a loop. do samsung tvs no longer have the backlight self test feature built into the power supply?
          i tested the backlight with my LED tester and it lights up both strips. one of them reads 100v and the other reads 63.7v.
          unplugged mainboard from power supply but left backlight plugged in, and then plugged psu wall power in. expected to see backlights light up but see nothing.
          according to how ive diagnosed in the past, this would almost always be a bad power supply. replacement power supply was cheap like 20$ from ebay. but still i get not even...
          09-13-2023, 10:43 PM
        • CaptainBucko
          Acer ER320HQ backlight issues
          by CaptainBucko
          I have two Acer ER320HQ monitors. Both have dark background (I presume backlight issues) in on the left and right hand sides of the screen. Otherwise image is clear. Can these be repaired? The monitor is supplied externally with 19v DC and I have confirmed that supply is good and stable. Any further thoughts or pointers?...
          12-18-2024, 06:09 PM
        • PJK65
          ASUS Q502LA LED Screen/Backlight Issues
          by PJK65
          Hello Everyone.
          Glad to be a member here! I am pretty new to working on laptops. I was hoping I was going to able to fix this one, but I am having some problems...
          This laptop works perfectly with a HDMI monitor hooked up to it. Here in lies the problem. No backlight! So i figured, replace the screen/backlight assembly. Then I had very dim video (could be seen with a flashlight) but still no backlight. Found after doing some homework that it had a blown ferrite bead, which I replaced. Like an idiot, I forgot to unplug the battery, and when I was hooking back up the 30 pin cable,...
          02-24-2023, 04:47 PM
        • DanPoka
          Guide me through repairing a Dell p2210f LCD ccfl backlight monitor
          by DanPoka
          I bought this p2210f dell monitor to fix. Schematic is the same as p2210.
          Behaviour is that monitors comes on but then backlight switches off almost instantly. If I look with flashlight I can still find the "No signal message". So definitely a backlight issue. Trying to advance the issue I proved that the protection circuit is switching off the backlight by shorting out C3 and resistor to disable the INL chip then re enable by removing the short.
          This is where it gets interesting. When I disassembled the monitor to solder leads on c3 capacitor I noticed the backlight flickered...
          02-15-2025, 05:05 AM
        • Comp_Pro
          No Backlight Macbook A1990 820-01041
          by Comp_Pro
          Hello all,

          Am trying to figure out this backlight issue with this A1990 Macbook Pro.

          Tests performed:

          There is no backlight even with a good screen.
          Backlight IC is receiving the correct support voltages.
          Fuse F8400 ok
          Current sense resistor R8400 ok
          Backlight IC is receiving 3.3V on enable pin.
          Backlight IC receiving voltage from PPBUS_G3H, aprox 12.5V.
          Backlight IC receiving 5V from PP5V_G3S
          Backlight IC BKLT_SCL and BKLT_SDA both measure 0.545V diode mode to ground
          I2C_BKLT_SCL and I2C_BKLT_SDA both measure...
          05-06-2024, 10:23 PM
        • Loading...
        • No more items.
        Working...