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Monitor doesn't display any thing

When i turn my monitor and the compter on the HP 1940 monitor doesn't display anything

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  • Art Ellison
    Art Ellison May 11, 2010

    What do you mean? Does it turn on? Is the monitor power light green or yellow? Do you see anything at startup? does the screen stay black?

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Probably short circuit in one of the power inverters

replace transistors Q808 Q809 (C57071) and Q805 (J598KS)

or

transistors Q815 Q816 (C57071) and Q812 (J598KS)

check fuse PF701 (5A)

good luck
nissle

Posted on Apr 27, 2009

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Try disconnecting the video cable and connecting it again. Turn on. If that fails, you need to try other fix.
Ok, this fix requires to open the thing. Once open:
1) Remove ONE memory stick. Turn on. If nothing, replace the other memory sick and replace the ONE previously removed. Nothing yet?
2) Check if the processor fan is running. If so, remove the processor from its slot and clean the grids of the heat sink and fan, replace the processor and heat sink and turn the PC on.

Posted on Apr 15, 2009

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1 Answer

I manage a building, located in a suburb of Houston TX. We have had several HP 1940 monitors overheat and start smoking (about 10-15) over the last couple of years. The company who provides IT service,...


Well, hook up a voly meter that have a max an min logging then take a look over time.

also, use a UPS on your monitor with a surge protection this will avoid line problem. then you will be able to argu that your line is not the problem.

As for the monitor itself, I can not tell.

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Release the menu button (check if anything is leaning on it), and press and hold the menu button again until the message disappears (app. 10 seconds). If this doesn´t work, the button may be stuck, or there´s a problem with the hardware.

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Nothing comes up..after connecting it to my laptop


Try using the menu on the monitor
to change the input mode (much like changing the input channel on a tv).

also make sure that your pc display settings are set correctly.

Mar 04, 2010 | HP L1940T 19" LCD Monitor

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HP 1940 turns off after a second or two desktop appears with a message no signal detecked


no signal detected is displayed when there is no sync pulse detected by monitor. look in the monitor cable connector and see if you have a pin bent down. same at video connector at pc. if no bent or missing pin it probably bad in monitor itself. do u have another monitor you can hook up to pc? that could tell you which end is defective.(pc or monitor)

Aug 20, 2009 | Computers & Internet

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HP 1940 goes blank After 3 Seconds. after turning on this monitor it goes blank if i turn it off then on again it will display the comptuer output again but then turn off after a few seconds. any hints?...


Run a monitor aelf test.... Remove the monitor cable from the back of the tower... and see if it run self test.... also a install the driver for the monitor

Aug 03, 2009 | Computers & Internet

1 Answer

HP 1940 LCD Monitor power and other manual controls do not work


there's an internal hardware problem in your monitor - cold soldered / defective electronic part/s. I suggest to bring the unit to an authorized service center for proper diagnosis & fix the problem. best regards

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hello sir your vertical or horizal IC damaged.......... thats why its showing multi colour ...... just do one thing sir.......... fit your new IC 

if your problem not solved..... type in comment

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2 Answers

MONITOR HP L 1940 TFT


I jammed my auto button and the screen now stays on!

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