Re: How do I open the case on a CTX desktop computer? All...
I don't know about CTX, however, some cases I have dealt with require pulling the front plastic bezel (cover) off - sometimes there's a plastic release underneath the front edge you pull outwards to remove the cover. After that, there is a screw at the top center or screws on the sides to remove to get at the insides.
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Power supply failures in a HP computer can cause your computer to fail to turn on, to operate erratically or cause certain system components not function.
However, the power supply is one of the easiest parts of a computer to replace.
You don't need any special skills to do this.
If you're nervous about opening up your computer case and potentially damaging a computer component, don't be.
All you are really doing is plugging in power supply cables after securing the power supply.
The process should take 10 minutes maximum.
Shut down your HP computer.
Disconnect the power cable from the power supply on the back of your computer.
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules
Only work inside the computer case when the power has been switched off and disconnected. Never open the power source.
Some of the below steps recommend removing physical parts within the computer.
While in the computer it is highly recommend that you be aware of ESD and its potential hazards.
Unscrew the side panel from the back of the case and slide it off.
Newer HP computers may have a case door you can open for access or have access buttons to press.
Look at the back of your HP computer case for a set of four screws near the top of the case. Remove these screws and set them aside.
Carefully slide your power supply out of the mounting brackets and set it on a clean working surface.
Do not disconnect any of the power connectors yet.
Slide your replacement HP power supply into the case and use the mounting screws to attach it to the chassis.
Use your old HP power supply as a guide to connect your new power supply to all the computer components.
Switch the power cables from each device from the old supply to the new supply so you don't miss connecting any cables.
Check that all the components have power cables inserted and the old HP power supply is completely disconnected from the system.
The power supply is one of the most common components to fail inside a desktop computer. If you don't mind turning a screwdriver, you can replace a bad power supply yourself and save on repair costs.
Before purchasing a replacement power supply:
- Make sure to get a power supply that is rated for at least the same wattage as your current power supply. - Verify that the new power supply has all of the necessary connectors that your current one has. You can either check this visually by looking at the connectors that you have, or by making sure your computer is listed as one of the models that the new power supply is compatible with. - Make sure the new power supply will fit inside your computer's case. (If the new power supply is compatible with your computer, that won't be a concern.)
To install the new power supply:
- Turn your computer off and unplug it from its power source.
- Unplug all of the cables leading from your computer, including the power cable. - Open the computer's case. (If you're not sure how to do this, you can probably look it up online. Most computers either have screws in the back that come out, a side panel that slides off, or they open up like a clamshell.) - Disconnect all of the cables leading from your power supply. Note what component each connector plugs into. You should have connectors for your fan(s), hard drive(s), optical and/or floppy drive(s), motherboard (may be one or two connectors), and the front power switch. - Unscrew the power supply from the system case and remove it. - Set the new power supply in the case facing the same way as the old power supply and screw it in. - Attach all of the connectors. (You may have more connectors than components, but make sure each component that was connected before is connected again now.) - Close the system case and reattach any screws.
- Plug the power cable into the power supply and then into the wall outlet.
- Reattach all other cables. - Make sure the power switch on the back of the power supply is on. - Make sure the voltage switch on the back of the power supply is set to the correct voltage (115 volts in the United States). - Turn on the computer and verify that it boots up correctly.
for replacing the fan you must open computer case unplug all power cords, remove 4 screws near the rear fan and pull out the power supply from the top interior. then you have at leat more 4 screws to remove the power supply cover out. then you will see the other 4 screws to remove the fan. if you just simply want to clean the fan open the computer case go to outside, take an air compressor and blow air into the fan and at the rear od the power supply on the air intake and you are done.
Open the case. Disconnect all cables from power supply. Unscrew the power supply. Remove it from the case. Install the new one. Screw it. Connect all needed cables. Close your case. It's done. Turn on your computer and enjoy.
This guide was developed to instruct readers on the proper procedures
for installing a power supply unit (PSU) into a desktop computer case.
It includes step-by-step instructions with photographs for the physical
installation of the PSU into a computer case.
IMPORTANT: Many name brand manufacturer PCs use specially
designed power supplies that have been built specifically for their
systems. As a result, it is generally not possible to buy a replacement
power supply and install it into these systems. If your power supply
is having problems, you will likely need to contact the manufacturer for
repairs.
CAUTION: All power supplies contain various capacitors
inside of them that retain power even after the power supply had all
power turned off. Never open up or insert any metal objects into the
vents of the power supply as you can risk electrical shock.
To start with installing a power supply, it is necessary to open
up the case. The method for opening the case will vary depending upon
its design. Most new cases use either a panel or door while older
systems require the whole cover be removed. Be sure to remove any screws
fastening the cover to the case and set them aside.
Align the new PSU into place in the case so that the 4 mounting holes
align properly. Make sure that any air intake fan on the power supply
that resides in the case is facing towards the center of the case and
not towards the case cover. Now comes one of the most difficult portions of the power supply
installation. The power supply needs to be held in place while it is
fastened to the case with screws. If the case has a shelf ledge that the
power supply sits on, it will be easier to balance.
Make sure that the voltage switch on the back of the power supply is set
to the proper voltage level for your country. North America and Japan
use 110/115v, while Europe and many other countriesuse 220/230v. In most
cases the switch will come preset to the voltage settings for your
region. If the computer already has the motherboard installed into it, the power
leads from the power supply need to be plugged in. Most modern
motherboard use the large ATX power connector that gets plugged into the
socket on the motherboard. Some motherboards require an additional
amount of power through a 4-pin ATX12V connector. Plug this in if
required.
A number of items reside within a computer case that require power from
the power supply. The most common device is the various hard drives and
CD/DVD drives. Typically these use the 4-pin molex style connector.
Locate the appropriate sized power leads and plug them into any devices
that require power.
At this point all of the installation and wiring should be completed
with the power supply. Replace the computer cover or panel to the case.
Fasten the cover or panel with the screws that were previously removed
to open the case.
If you want to remove / replace the fan you will need to completely remove the power supply box from the computer case.
There should be 4 screws on the back panel of the case holding the power supply box in place.
Unplug the computer power cord and monitor cable from the back.
Open the computer case and disconnect all the cables from the power supply to the components and motherboard (be sure to keep track of what goes where).
Hold / support the power supply box inside the case while you remove the four screws from the back so it doesn't fall down and break something on your motherboard.
Once you have the power supply box out of the computer case, you will need to remove the 4 additional screws holding down the power supply box cover. Once the cover is removed you will see and be able to remove the power supply circuit board and the fan if you want.
Good luck and please comment back if this was helpful.
There should be at least 4 more larger screws, maybe even "thumb screws", that will have to be removed as well. These screws hold the sides of the case on. Try removing those and sliding the sides back to open up the case
glenn659, possible cause is bad internal switch-mode-power-supply" failure or SMPS is detecting something wrong with lcd cold-cathode-fluorescent-tube backlighting circuit, (INVERTER) and it goes into SHUTDOWN mode to try and prevent a catastrophic failure from occuring. Glenn, visit youtube, search for video clips on LCD monitor disassembly and also also research BAD Capacitors or Swollen Capacitors and also the "WHY DO LCD MONITORS FAIL PREMATURELY" Certainly your's will be in the top two causes! Did you do the flashlight test with your monitor "on" and connected to a known good PC with the WIN-desktop screen showing. Even though screen is BLACK it might still show the desktop when you hold the light about 1" from screen. Some will, some won't depends on condition of the power supply. In any case get back to me with your plan of action you intend to take after viewing YOUTUBE stuff. Bye for now. I'm louie12fix on fixya or [email protected]
Open two screws in back of the computer case, take the side panel out, unscrew old power supply, disconnect the cables also, take the powersupply out, insert new powersupply, screw it in and connect the cables.
From the looks of things that model will take a standard ATX power supply which would be available from and computer part dealer and ebay etc, get yourself a nice 400w replacement try and get a small form factor one if you can as it will be a tight sqeeze inside the case.
when replacing it you will have to open the case up (get an anti static wristband if you can, and work on a table rather that a carpeted floor) un hook all the connectors the old power supply (one in each drive and there should be 2 in the motherboard) you may have to pull the Dvd rom out slightly to get the new supply in, unscrew the 4 case screws holding the power supply from the back of the case. lift it out then put in the new one, screw it in using the case screws and connect up the internal power cables to the drives motherboard and new graphics card, close the case, plug in and voila
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