Question about HP L1740 17" LCD Monitor

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Why my hp L1740 LCD monitor was no dipslay and power , power was good

Before it happens first, when i switch it on power was on and will goes for and becomes black again. after second time light blue color on screen goes on for a second, when i plug the power again, it had no display and no power indicator at all.

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Hello, welcome to Fixya!

Your monitor is having a power fault because it is not switching on. The monitor might have worked fine in the past, but that's electronics for you. Power surge, irregular power supply, excess power supply, etc can affect the unit thereby not making it to power on.

First, remove the unit's power cord from the wall, wait for about 30mins, then plug it back in. If it doesn't power on, plug it into another outlet, to make sure there electric current entering into the rmonitor.

If plugging into another power outlet doesn't power it on then it confirms that the receiver is having a power fault.

When electric current comes from the power outlet into the monitor, it goes straight into the power supply board which then circulates the current into the unit. So if the monitor doesn't power on, the first thing is to make sure there is power entering into the monitor.

So check the power cord, if it is a 3-pin plug, it must have a fuse in it. check the fuse if it is not blown. if fuse is intact, then power supply board should be checked.

This unit must have a power supply board in it where power enters from the mains. A capacitor, fuse, diode, etc may have been defective on the power board and maybe that's why its not making the unit turn on. There might also be some disconnection or something, inside the unit which is not making it to power on.

To actually find out what's wrong, you need to disassemble the unit with a screw driver and check what's wrong. You will be needing a meter and continuity tester in order to read the components on the power board. Once you detect any bad component, you can make necessary replacement at any electronics accessories store withing our vicinity. This is the only way by which you can detect and solve the problem.

Of course, testing the power board with a meter will require someone that has the ability. So it you can't, then you might be needing the help of a repairman or you can call a friend that has the ability to help you out.

I wish you the best of luck.

Regards.

Posted on Jan 05, 2012

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Posted on Jan 02, 2017

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1 Answer

Our hp L1740 LCD monitor was no display and no power indicator at all.


Hello, welcome to Fixya!

Your monitor is having a power fault because it is not switching on. The monitor might have worked fine in the past, but that's electronics for you. Power surge, irregular power supply, excess power supply, etc can affect the unit thereby not making it to power on.

First, remove the unit's power cord from the wall, wait for about 30mins, then plug it back in. If it doesn't power on, plug it into another outlet, to make sure there electric current entering into the rmonitor.

If plugging into another power outlet doesn't power it on then it confirms that the receiver is having a power fault.

When electric current comes from the power outlet into the monitor, it goes straight into the power supply board which then circulates the current into the unit. So if the monitor doesn't power on, the first thing is to make sure there is power entering into the monitor.

So check the power cord, if it is a 3-pin plug, it must have a fuse in it. check the fuse if it is not blown. if fuse is intact, then power supply board should be checked.

This unit must have a power supply board in it where power enters from the mains. A capacitor, fuse, diode, etc may have been defective on the power board and maybe that's why its not making the unit turn on. There might also be some disconnection or something, inside the unit which is not making it to power on.

To actually find out what's wrong, you need to disassemble the unit with a screw driver and check what's wrong. You will be needing a meter and continuity tester in order to read the components on the power board. Once you detect any bad component, you can make necessary replacement at any electronics accessories store withing our vicinity. This is the only way by which you can detect and solve the problem.

Of course, testing the power board with a meter will require someone that has the ability. So it you can't, then you might be needing the help of a repairman or you can call a friend that has the ability to help you out.

I wish you the best of luck.

Regards.

Jan 05, 2012 | HP L1740 LCD Monitor

1 Answer

When the monitor is turned on the screen goes on but there is a buzzing noise coming from the power supply board, then after 3 seconds the monitor goes black but the green power light is still on and the...


Sounds like the common Bad Capacitor story! If your monitor is not under warranty and you have any soldering skills this is only a 10 dollar fix. There are dozens of tutorials on youtube that will walk you through this. Search "Monitor capacitor replacement".

Aug 05, 2011 | HP L1740 17" LCD Monitor

1 Answer

My hp 1740 lcd keeps on turning on and off


Check your power cable connections and make sure they're not loose at all. Also try hooking the monitor into another computer to see if there could be a problem with the computer it's currently hooked into. If your cables are good and it works on another computer, try updating your graphics card drivers for your system. It could be that it's changing resolutions and keeps blanking the screen, so check the resolution settings (right click on the desktop>Preferences>Advanced).

Tj

Jul 20, 2011 | HP L1740 17" LCD Monitor

1 Answer

My monitor always turn to black out and directly goes to automatic adjustment mode


that always do if the program you are using does not support screen resolution settings on your monitor.

when it automatically on adjustment mode, try to default that mode on your system.

Mar 05, 2011 | HP L1740 17" LCD Monitor

1 Answer

My HP Lcd L1740 Monitor works fine except I can't get the usb ports to work. Please Help.


hi i have hp lcd 1740 have power but skin is white pls pls ane body give me soletion
pls pls

Jan 15, 2011 | HP L1740 17" LCD Monitor

2 Answers

My hp 1740 automatically turns on and off in seconds


krishna s701, ALL cold cathode fluorescent lamp, back-lit lcd monitors use the same basic engineering design principles and mode of operation to display information on the glass lcd panel. I suggest you surf over to this old blog and see if something seems familiar!!! http://www.lesliewong.us/blog/2005/05/02/hp-pavilion-f1703-flat-panel-display-blackout-solution/ My best guess is that the internal "switch-mode-power-supply" has detected a "fault condition" with itself or the CCFL electronic ballast circuit and goes into "full or partial shutdown mode" to save itself from a catastrophic, nonrecoverable event!! e.g. sparks, smoke, fire!! 12fixlouie

Oct 08, 2010 | HP L1740 17" LCD Monitor

1 Answer

Why our HP L1740 17" LCD monitor has no display at all but had power


Good Day sir/maam, lets try to make sure that the LCD is the problem and not the CPU,
  1. Swap your LCD to a good CPU, to check if the LCD is good (visit a friend who has a PC).
  2. Or as you boot your PC, did you hear a single beep? and
  3. Does your PC hard disk led blinks.
If you insist that the LCD is the problem, you may need to check first your dealer for advice.

Oct 20, 2009 | HP L1740 17" LCD Monitor

1 Answer

It will turn off on it's own, and I need to turn power to monitor on and off a few times to get it back on. Any thoughts?


check the power supply,may be use another cable to check if it's that if not it won't turn on soon!!!!

Sep 12, 2009 | HP L1740 17" LCD Monitor

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