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Monitor LT73 is dead no power when turned on. Mel

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If you dont even get a yellow light, red light, let alone a green when its plugged then its eather a faulty outlet or bad power supply.

Posted on Feb 16, 2009

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Check out the cables at they will be loose not connected properly.also remove the batrtery and reinsert and check out.other wise it can be power failure in the circuit board needs reparing.

Posted on Feb 16, 2009

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Check the power cord. The problem is a faulty powe supply.

Posted on Feb 16, 2009

  • Ginko
    Ginko Feb 16, 2009

    Check first that the power cord is well plugged.
    Test a different outlet, and if you have another power cord test it.

    If it still has no power then the psu board has blown, usually a blown capacitor.

    In that case find a local repair shop to fix it.


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no country stated or if not usa what is your line power?(volts AC)
your PSU is inside monitor not outside, so uses a simple line power cord. (just wires)
12 year old monitors, found, (dead)
page one of your user guide is clear, read it yet?
seems not.,
Auto-ranging, 90 to 265 VAC
1280 x 1024 @ 60 Hz, 75 Hz (never higher) resolution settings.
those are very old monitors.. worth like $10 used.
if the power lamp shows wrong, the monitor is dead.
right button is power to the right of it is a power led that must glow.
the old monitors had CCFL backlamps before year 2010.
those are back lamps, that fail fast. 20k hours, fast. (short)
first is the power switch
2nd is a working PC with at least sync signals on 2 pins
Horz/vertical.
then the OSD screens work of not the monitor IS DEAD.
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some have an OSD lock, so hold the menu key for 10 seconds
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see page 4-10
the guide is here. not too good , poor diagnosis sections
http://h10032.www1.hp.com/ctg/Manual/c00276671



specs.
https://support.hp.com/us-en/product/hp-l1940-lcd-flat-panel-monitor/427303/document/c00278650#AbT3


testing
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with a PC working, say running any BIOS screen only....
or running, windows, in low resolution mode 1280 x 1024
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at mon.
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then take a flash light . point it at screen
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as are most 12 years old montors now.

see those 4 cream colored connectors bottom of this PCB
those are the high voltage CCFL lamps.
2 lamps 4 ends. the lamps are bad or the board 500 to 1000vdc
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1940-owkjznuqojna0gup3jqh3ggp-2-0.jpeg

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