Question about Dell UltraSharp 2405FPW 24" Flat Panel LCD Monitor

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How can i open the 2405

Seems the power supply is down, fuse ??, But how can i open the frame ?

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To open the case of DELL 2405FPW (and 2407FPW and many others): first prepare a clean, clear area of bench to work on. A cluttered bench could result in damage to the screen when you lay it flat on its front!
a) unclip the panel from its stand and remove the four screws in the center that usually hide behind the VESA Mount.
b) stand the panel upright on the bench on its bottom edge. Using your fingertips prize the front bezel (plastic frame) forward from the glass, but without putting excessive pressure on the glass. It should come away with a series of 'snaps' as it releases from the back section of the plastic case. Proceed all the way around the screen detaching the bezel from the back. You do not need to completely remove the front bezel as it is connected at the bottom with a ribbon cable to carry the signals for the buttons and LEDs and this cable must not be stressed.
c) The back section of the case, together with the silver portion (which is screwed to it) can now be completely removed and the panel laid face down on the bench, resting in its bezel. Do not lose the little mounting release button which is now free too fall out of the back of the Vesa mounting in the case!
d) Now we see all the metal covers hiding the various subsystems of the monitor. With the bottom of the screen towards you on the bench, the driver for the backlight is readily accessed by removing the four screws holding down the shiny cover on the left. But I wasn't after that.
e) to access the power supply and system board you first have to remove the shiny cover over the memory card reader/USB hub on the right. Remove the single screw on the top left of it. While gently lifting the two little clips at the extreme right-hand edge, slide the shiny cover to the right to release it from the main panel chassis.
f) Now you should be able to access all six screws holding the central metal cover on. Remove the screws and simply lift the cover upwards to expose the PSU and system boards.
g) To remove the power supply board: Note the position of the little black plastic clip retaining the power inlet connector before removing it. Disconnect the two multi-way cable looms from the system board (right) and backlight inverter board (left, top). NOTE: The looms do NOT detach from the power supply board! Remove the three screws from the corners of the power supply board (note these are the ones with very broad heads) and the big shiny screw tying the protective earth lead to the chassis. The PCB is now only held in place with a little white plastic clincher near the middle which needs both sides to be squeezed before the board can be lifted clear.

My particular monitor had a failed POWER SUPPLY board. To see how you can fix it if you had the same problem as me, I have a full account here on Fixya: "Repair of DELL 2405FPW"

Hope this helps!

Posted on Apr 18, 2011

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I opened up an LCD by removing any screws you see on the backside and any that may be hiding under rubber buttons or stickers. Gently pry apart the frame from one side, center. Youll find out that the frame is clipped onto the rear part by integrated clips and youll ba able to see if you need inward pressure on the frame or base to unclip the frame portion. It is a "nervous time" procedure but the plastic is pretty tough and its not doing you any good as it sits, right? The power supply had one fuse and had the inverter intregrated into it. Mine was fine, but an SMT MOSFET component on the driver board was completely blown apart from voltage spike. Salvaged LCD and tossed.

Posted on Jan 08, 2009

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1 Answer

My monitor won't turn on properly. It just cycles power on and off at the opening Dell Screen.


please check proper powersupply & when power is ok then open the monitor & check fuse ,main filter capacitor& bridge diode.

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You will have to open it up and inspect the main AC fuse first, also need to look for bad caps with bulging/leaking tops-bottom.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), 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 VIEWSONIC VX series monitors to get some ideas what to look for: http://s807.photobucket.com/albums/yy352/budm/
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

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Look for bad caps first and main AC fuse, yours is very similar to VA702.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), 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 VIEWSONIC 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

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

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1 Answer

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1. Make sure first that it is not the power plug that has the problem. You can use the power plug of your cpu as replacement to test if its working fine.

2. At the back of your Lcd monitor, right on the section where the power plug is connected is the power supply section of your monitor. You can try to open the back of your monitor if you have guts and willing to do it yourself. It is however too risky and its not easy to open it as you will need to use a flat plastic object to separate the back cover from the lcd frame.

3. On the power supply section you will find a series of blown capacitor and a fuse. Just make sure you replace it with exact value. To remove and replace the parts you will need a soldering iron, lead and soldering sunction.

Good luck.
If this will cause you your time and you don't have the right tools to do it yourself, the best suggestion is to bring this unit to a nearest service center.

Please rate. Thanks for using Fixya.

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Hi! ive got a problem.. my lcd monitor just turn down.. i mean totally dead.. i dont whats the problem.. it just died when i was using my computer.. my question is.. is there a fuse inside the monitor?...


You may have bad backlight inverter circuits, lamp assemblies, power supply failed due to bad caps. Yes, there are fuse insdie for the inverter and the main fuse.
You need to open it up.post pictures if you can for details help.

http://s807.photobucket.com/home/budm/allalbums
Capacitors kit: http://lcdalternatives.auctivacommerce.com/
he can make you a set of caps for you.
http://en.wikipedia.org/wiki/Capacitor_plague

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1 Answer

Power light just blinks on my HP monitor but it won't turn on, anyone else have this issue? It I power down na dreboot it just blinks some more, I do not any kind of reset on it.


You need to check out the power supply section.
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

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1 Answer

My monitor cannot pick up signal.


If your monitor displays No Signal, it means there is no video signal coming from the computer. Monitor is working fine.

It may just be the monitor cable. Do you have another one, or one you can borrow from another computer, for a test?

If a known, good, working, monitor cable yields the same results, the problem is your computer.
The computer isn't working.

The problem may be due to the power supply. Most of the time it is.

This statement is given because of,
A) Most of the computers that come to my shop, have this problem.
B) If you look on the internet, it is a common problem stated.
C) Most of the problems on here, are due to power supply issues with the computer.

You may see, or hear fans spin. Lights light, and it may sound like the harddrive is running.
Problem is, the processor doesn't have enough power to operate, so nothing is going to get done.

The main rating for power of a power supply is Watts.
Voltage times Amperage = Watts.

1) ALL the lights use less than 1 Watt

2) EACH fan uses 2 to 3 Watts

3) A typical Processor uses 55 to 125 Watts.
Depends on what processor it is.

The power supply has 3 main voltage power rails.
A) The 3.3 Volt rail
B) The 5 Volt rail
C) The 12 Volt rail

If the power supply develops a weak, or failed voltage rail, the Processor does not get enough power. Won't turn on.

Most of the time a power supply fails because it is dirty inside. (And the inside of the computer)

The simple solution is to unplug the computer from power, open the computer case, and use a can of compressed air for computers, on a regular basis.

Install the plastic 'straw' into the nozzle, and shoot air into the inside of the computer in rows.

Start at the top inside part of the computer, going from one side, towards the other side.
Then go down towards the bottom.

Tip the case slightly with one hand, and use the other hand to shoot air towards the bottom, to remove the remaining dust/dirt.

Shoot air into the power supply, from the back of the power supply through the ventilation holes. (Inside of computer)

Use a few Q-tips, and clean the fan blades, center hub, and surrounding cage, of the power supply fan, then use air. (Back of computer)

The rest of the time the fault lies in bad Electrolytic Capacitors inside the power supply.

CAUTION!!
NEVER open a computer power supply!

The Electrolytic Capacitors inside, hold a charge for Weeks, sometimes Months, after the power supply has been unhooked from power!

You can get shocked Badly, or even Fatally!
Best solution is to replace the power supply. If you have another working power supply, you could use it for a test.

[Be sure to work on a table. Be SURE to touch the metal frame of the computer case, (Case open),
BEFORE you reach inside!
(Computer UNPLUGGED from power)

Your body carried Static electricity. Static can fry out computer hardware components, in a New York second!
Computer unplugged from power you're safe.
Touch the metal frame before reaching inside, the computer is safe.

If you get up for any reason, leave, then return, touch the metal frame again!]

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2 Answers

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If you can solder connectors you can build your own power supply for SOYO. Try the following link or google "gbyer external power supply".
http://slickdeals.net/forums/showthread.php?t=1655449&page=5
Replacement power supplies were avilable recently but it seems they are all depleted.

Nov 06, 2009 | Computers & Internet

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