Question about HP OmniBook XE4500 Notebook

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How do i remove the covers?

I suspect that i have a power supply problem but i do not know how to remove the covers. please advise

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  • laser90 Oct 25, 2008

    How do you remove theback cover off as it seems i have a problem with the power supply, as the blue main light is flashing and the laptop will not fire up

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I've got a Uniden UH-011 UHF Radio that powers on for a few minutes and works fine for a few minutes then goes dead. Anybody got any suggestions to fix the problem?


Mobile radios usually don't do this. BUT! If it is using a power supply to make 12 volt power, that is suspect. Power supplies can become intermittent. Perhaps you do not have enough amperage. The short answer is not enough power in your configuration. Post how it is powered for more advise. Let us know! J

Jun 04, 2016 | Uniden Radio Communications

1 Answer

I have SONY TV Model # KV-27V55 Trinitron, Serial # 7085574. It suddenly stop working, if I pust to power on button of the TV set or the remot but it not starts. What to do now? Please advise me.


It is possible that this is a power failure within the power supply. But sometimes there is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.

The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.

Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing.

Check for tips to look into the SMPS unit with some of my tips:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Thank you for using Fixya.


Aug 22, 2011 | Sony KV-27V55 27" TV

1 Answer

No picture and the on/off buttone just blinks


Good Day Trek!

Are you familiar with electronic components? Do you have technical skills and tools?

If yes, let us try fixing your LCD monitor by yourself.

Do you see where the end of the power plug connects with your monitor. The part where the power plug connects is the power supply section. To see the board assembly and its component you will need to open the back cover of the monitor.

To open the back cover, you will need a flat screw driver capable enough to separate the cover off the frame of the monitor. Careful, it is a snap in lock.

Once you have remove it, examine the power supply section. Find the blown / leaked / bulge capacitors and replace it with exact ratings and value. That will fix your No Picture problem.

Remember, monitor should be off when doing this. You will need soldering iron and pump to remove soldered joints of the capacitors. And soldering iron and lead to fix the terminals of your new capacitors.

After that, return the cover, plug the power cord, connect your monitor to your PC and turn it on.



Trek, if you do not know how to do it, it is best advised to bring the monitor to a certified technician to avoid injury and inflict further damage to your monitor.
Good Luck!

Jun 10, 2011 | Samsung SyncMaster 940T 19" Digital/Analog...

2 Answers

Error 2200


Power off the AIO and remove the power supply(Power Cord) from the back of the unit.
Open the scanner cover. Check the scanner glass for cracks and the scanner casing for cracks. Close the scanner lid.
Open the top cover of the AIO.
Using the carrier belt, move the cartridge carrier to the middle of the unit.
Remove both cartridges, close the top cover, reinsert the power supply, and power the AIO on.
IF THE ERROR MESSAGE DID NOT COME BACK....
Power off the AIO and remove the power supply from the back of the unit.
Open the top cover of the AIO.
Using the carrier belt, move the cartridge carrier to the middle of the unit.
INSERT THE COLOR CARTRIDGE ONLY,
Close the top cover, reinsert the power supply, and power on the AIO.
IF THE ERROR MESSAGE RETURNS.. GET A DIFFERENT COLOR CARTRIDGE AND REPEAT THIS PROCESS....
IF THE ERROR MESSAGE IS GONE,
Power down as before, do all the same to get the carrier to the middle of the unit and RE-INSTALL THE BLACK CARTRIDGE.
Power back up as in previous steps...
If after trying all of the above and the error message does not go away, you unit would need serviced (if it's under warranty, it's worth it; if not, you might want to replace it.)

Feb 06, 2010 | Lexmark P6350 All-In-One InkJet Printer

1 Answer

Vizio vp50hdtv20a won't turn on.


The power supply is the culprit.. Check out my video that explains everything..

http://www.youtube.com/watch?v=v_oL1i6VOGM

Jan 05, 2010 | Vizio P50HDTV20A 50 in. Plasma HDTV

1 Answer

Xerox workcentre m 20i does not power up


First of all try unplugging it for a half an hour. Not just turning it off but remove the power cord. Very often there is a capacitor in that power supply filter you have to let discharge totally.The only way that will discharge is to remove all power for a half an hour.
A dead machine otherwise , would he a bad power supply. It is located under the cover where the copies come out. There is also a couple of fuses on that power supply. To access it, go to the left side of the machine, the side where the on off switch is and remove the 2 silver Philips screws on that side. There is also a tab on that cover, so don't be afraid to pull it pretty hard to remove, It will Pop, but not break. There are 3 screws in the metal cover over the power supply to remove the cover, check the fuses, if they are good the power supply is bad. Google a business called The Parts Drop, call Britt and he will have that part. There is a really good chance that unplugging it for the half an hour will work. I have taken tons of calls and canceled calls where that is all you have to do. Let me know please.
The main board is highly unlikely to cause a dead machine, very unlikely. Actually it can happen, but I have never seen a main board cause a machine to be dead.

Mar 02, 2009 | Xerox WorkCentre M20i All-In-One Laser...

1 Answer

Acer aspire computer with liteon power supply PY300B00153201AA6E


power supplies are easy to replace. usually 4 screws. open the pc. remove the screws and unplug it from the motherboard. a replacement costs 40-60 dollars. plug it into the same place(s) you unplugged the original pwr supply. replace the screws. replace the cover and thats it.

Jan 08, 2009 | Lite On LiteOn 204Watt PA-4022-6B Power...

1 Answer

TV stopped working.


After you remove the back cover inspect the power supply board for swollen or bulging capacitors. Pull and check any capacitors that you suspect to be swollen. Next, look for a sticker in the back side of the TV set. Use the values you find on the sticker to calibrate the voltages on the power supply board.

Aug 04, 2008 | Televison & Video

2 Answers

Scanner Problem


See if this helps Power off the All-In-One (AIO) and remove the power supply from the back of the unit. Wait 30 seconds, then reinsert the power supply and power the AIO on. Did the error message return? Yes: Continue to step 2. No: Print a test page. If the test page prints, the error is resolved. 2 Power off the AIO and remove the power supply from the back of the unit. Open the top cover of the AIO. Using the carrier belt, gently move the cartridge carrier to the middle of the unit. 3 Remove both cartridges from the AIO. Close the top cover, reinsert the power supply, and power the All-In-One (AIO) on. Did the error message return? Yes: There is a hardware problem with the printer. Continue to Contacting Lexmark. No: Continue to Step 4. 4 Power off the AIO and remove the power supply from the back of the unit. Open the top cover of the AIO. Using the carrier belt, gently move the cartridge carrier to the middle of the unit. 5 Insert the color cartridge. Close the top cover, reinsert the power supply, and power the AIO on. Did the error message return? Yes: Continue to Cleaning the Cartridge Contacts, then repeat steps 4 and 5. If you have already tried cleaning the contacts, continue to Defective Cartridge Test. No: Continue to step 6. 6 Power off the AIO and remove the power supply from the back of the unit. Open the top cover of the AIO. Using the carrier belt, gently move the cartridge carrier to the middle of the unit. 7 Insert the black cartridge. Close the top cover, reinsert the power supply and power the AIO on. Did the error message return? Yes: Continue to Cleaning the Cartridge Contacts, then repeat steps 6 and 7. If you have already tried cleaning the contacts, skip to Defective Cartridge Test. No: Print a test page. If the test page prints, the error is resolved. Cleaning the Cartridge Contacts NOTE: The embedded links in the table lead to specific troubleshooting documents. Step Action 1 Power off the AIO and remove the power supply from the back of the unit. Open the top cover of the AIO. Using the carrier belt, gently move the cartridge carrier to the middle of the unit. 2 Remove the cartridges. Clean the cartridge contacts (click here for instructions) and the AIO carrier contacts

Sep 30, 2007 | Lexmark X4270 All-In-One InkJet Printer

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Apr 28, 2017 | Avira Computers & Internet

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