Question about Mag Innovision LT765b 17" Flat Panel LCD Monitor

1 Answer

The screen goes all white within 1 to 5 mins. of being turned on. kinda like my ex-girlfriend.

The screen is on for a while then it goes all white. i have to turn it off then back on. it does it about 1 to 5 mins. after turning it on.

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  • BigMike Montford Apr 15, 2009

    thank you so much. it was not to mch info, it was just enough.

  • Anonymous May 06, 2009

    If it is power supply, why would my monitor begin to display properly by me unplugging and re-plugging the logic board to panel cable, without me turning off the power? By the way, for safety, all electronics covers are left in place.

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  • Master
  • 5,660 Answers

Inside this monitor is a power supply. The power supply converts the AC electricity you have, (120 volts or 220 volts. Depends on what country you're in), to the needed voltage for the monitor.

The power supply is going bad. This is why you can turn it off and back on, and it works for a few minutes.

More than likely it's Electrolytic Capacitors that are going bad, within the power supply itself.
These capacitors break down due to a variety of problems. The largest issue, is that they are cheap components, and have an inherent problem before they were installed.

Capacitor Plague.
Let me explain. A number of years ago a certain individual stole an Electrolytic Capacitor paste formula.

[To simplify the construction of an Electrolytic Capacitor, let me state they are small aluminum 'cans', and have Electrolytic paste inside. (Ones used for computer related capacitors)

For a more detailed explanation of Electrolytic Capacitor construction, I invite you to go to Wikipedia.org, and type -> Electrolytic Capacitor <- in their search bar. Look under the Construction heading]

Unknown to the thief they were given a bogus formula. This formula of Electrolytic paste developed a gas after time. (Hydrogen gas)

This gas expands in the capacitor, breaks a seal, and Electrolytic paste starts oozing out.
For a small amount of paste loss, the capacitor operates in a weakened state.
Such as what you're experiencing.
After so much paste loss, the capacitor fails.

There is more than one capacitor that is used, in that monitor power supply. Some are still good enough to get the monitor to power on, but can't sustain power, so they can't keep the monitor on.

I know this may be way more information than you wanted, or needed, but I thought I would explain exactly what is going on.

Solution? I suggest you replace the monitor. Opening a monitor is VERY dangerous. I Do Not advise trying to fix it.

Posted on Apr 15, 2009

  • joecoolvette
    joecoolvette Apr 15, 2009

    Thank you, most kind. Feel free to rate my solution if you wish.

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