Question about Dell UltraSharp 2407WFP 24" LCD Monitor

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Screen dead, power works, but nothing works to the computer (cables are good - tried with another monitor)

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Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Replacement bd: www.lcdrepair.us

Posted on Jun 06, 2010

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Posted on Jan 02, 2017

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3 Answers

How do I retrieve photos on my hp pavilion 325c? When I try to turn the desktop on a light blink under the power button


The light blinking under the power button is Hard Drive activity which is normal. Do you have the monitor plugged in and switched on?

Nov 01, 2017 | HP Computers & Internet

1 Answer

I cant open my computer.


You're going to need to be a bit more specific than that. There are too many reasons a computer won't boot properly and it is the way it won't boot that tells people what the problem is.

If you'd computer doesn't turn on at all even if u push the power button, no sound no video no nothing, Kaput, then reassure your power is properly plugged in. Take the power cord and shove it in. Grrrrrrrr it takes a bit of force. If that doesn't work , check the power supply. Are the volts correct? In usa, that volt meter at the back should read 110 volts. If u live anywhere else, its 220 volts. If that's correct then check if the power switch is one in the power supply. Is the power cables inside connecting to the motherboard good? Is the power supply good? If everything a fine, u probably have a dead motherboard.

Miracles happen and u see something, but no video pops open. U either have a bad monitor or a bad graphics card. The vga/dvi/HDMI cables may jot be properly inserted. Is the monitor even on powered correctly?

Hurray u got it to boot but then u get blue screen. Or u get the the windows icon, but then restarts. It must be past the motherboard screen like dell Asus gigabyte etc, try reinstalling windows. If it doesn't work, u probs y have a dead hard drive.

Aug 27, 2014 | Computers & Internet

1 Answer

Gateway a computer desktop has power but nothing on screen the computer doesn't have a tower


1) Computer doesn't have a tower? Means it is a 'pancake style' of desktop computer. A flat model.

2) No signal on monitor screen?
Good.
At least we know the monitor is good.

Problem is monitor cable, IF separate cable; or computer.

Computer isn't sending a video signal.
No Signal, Power Saver Mode, etc.

If an older CRT type monitor, (Looks like a small TV), and monitor cable is not detachable; use a known to be working monitor, and monitor cable.

If a separate monitor cable, use a monitor cable from a working computer, for a temporary test unit.
Put it back when deemed monitor cable is the problem.

Logic at this point, would deem something is wrong with the graphics chipset.
Whether mounted directly to motherboard, (Integrated), or a separate graphics adapter card. (Graphics/Video Card)

However, computer could be dirty inside, or have a bad Power Supply.

LED's (lights) light up? Maybe fans spin?
Means nothing.

1) If ALL of the Light Emitting Diodes were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use from 51 to 130 Watts of power.
Just depends on what Processor it is.

Older desktop computer?
Ummm, 35 to 40 Watts.

That is why LED's can light, and maybe fans spin, but no computer.
NOT enough power to turn the Processor on.

Computer needs to be CLEAN on the inside. Inside of Power Supply too, as well as possible.

Proper method to do this procedure, post back in Comment if you need guidance.

Also remove ALL Ram Memory modules, and clean gold plated contact pins on bottom; with pencil eraser.
Reinstall. Make SURE they are seated in tight, and Lock 'ears' are locked in place.

Post in a Comment, as to the model number.
Example, DX4300-05. Should be on back of computer.

Regards,
joecoolvette

Mar 22, 2013 | Gateway Computers & Internet

2 Answers

The monitor does not power up. no power light comes on, there is nothing that shows up on the screen. All cables are well connected and yes the power switch is on.


check by changing the power cord if this does not solve the problem the fault is in the power of the monitor better call technician or take it to the service centre

Aug 02, 2011 | Samsung SyncMaster 940UX LCD Monitor 19...

1 Answer

My HP L2335 Monitor wont display anything. I can literally turn it on (the led power light comes on and it turns green if plugged in and I can tell the backlight is on), but nothing will display no...


why not try a dead display on 2 machines 2 PCs
using only 1 data cable at a time why try to confuse it????????

the OSD must work, or the display is bad or the power supply to it is dead.
easy as apple pie.

the monitor has a tiny computer inside it (micro)
on mine, the data lines dead shows NO SIGNAL in the screen
every time you I power up my monitor with data cables pulled off.

best is to read the book for your monitor, and run all the tests it
tells you there,

Mar 13, 2017 | HP L2335 23 inch Monitor

1 Answer

I have a sony sdm-hs75, power up then then the screen goes blank, power button is still green, with a bright light I can see the backgroud, caps look good, no cold solder joints. no hot spots on the borad.


try to perform selftest on the monitor..

  1. turn off the monitor
  2. unplug the video cable from the computer
  3. turn on the monitor wihtout the video cable connected to a computer
  4. you should see the information box on the screen (it indicates that there is no problem when you see the information box). Else, monitor backlight is dead.

Mar 18, 2010 | Sony SDM-HS75 17" LCD Monitor

2 Answers

My LG Flatron L1717S wen I power up it flashes good for 2 sec


are you getting a check signal cable message? any on screen instructions?

try the cable, if it works on another monitor, then sorry to say but your monitor is fried

Sep 01, 2009 | LG Flatron L1750S 17" LCD Monitor

2 Answers

No plug in play... don't think their dead... do I need drives first?


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.
inside this OLD monitor is sleep time, turn if off with OSD menu's its nothing but trouble.
some have an OSD lock, so hold the menu key for 10 seconds
and it unlocks. button 2 from left is MENU.
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
power it on, LED power , glows.
with a PC working, say running any BIOS screen only....
or running, windows, in low resolution mode 1280 x 1024
if wise set the pc up to that first. not second.
then plug in the vga cable so the MOnitor only sees that signal above. (if you do above wrong, monitor shows OUT OF RANGE on the screen)

at mon.
PUSH the OSD button, menu, if OSD is dead the montor is dead.
OSD= on screen display., (yes the LDC has brain inside)
then take a flash light . point it at screen
see data now, if yes, in the beam is data the back lamp is dead
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
power supply is dead.





1940-owkjznuqojna0gup3jqh3ggp-2-0.jpeg

Sep 20, 2017 | HP L1940 19" LCD Monitor

6 Answers

Black screen


if you can get into the menu your monitor should be ok. check the cables to the computer.you might have a lose connector on the videocard.wiggle the cable and watch the monitor. if nothing happens you might have a bad videocard. best way to chack monitor: connect it to a known good computer......

Dec 26, 2007 | Samsung SyncMaster 930B 19" LCD Flat Panel...

1 Answer

The screen seems dead


Hi, normally monitors have an indicator light that lites up when power is applied. This changes color or another lites up when it receives video signal from the computer. If no light then most likely defective monitor. Possibly the only way to positively check is to replace it with another known good monitor and connect to the PC. Power up and there should be a display. If there is then the 1st monitor is defective, if still nothing then it is the PC that is defective. It might also be worth to check/replace the power cord and/or video cable if applicable. Hopes this works out for you. Good luck and post again how things turn up.

Aug 05, 2007 | SGI Silicon Graphics GDM 4011P 20" CRT...

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