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Repair power supply

How do you get into the case?

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  • Dave Wood Nov 18, 2014

    Bose Sound Dock Mk1 with 2 18v supply switch mode Power

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My tv is turning on but switches on standby what is the problem?


It means there is a problem loading the power supply in the set down.

Someone would have to open set and first check power supply voltages and then try to track which line is loading voltages down.

Best case would be someone finds main voltage/s are not getting out of the power supply in which case it would have to be repaired or the power supply board replaced.

Mar 16, 2012 | Emerson LC320EM9 32 in. LCD HDTV

1 Answer

Connecting power supply to motherboard


Hi There

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.

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Dec 12, 2011 | Computers & Internet

1 Answer

Blinking red light. power off power on no success


May I suggest, you have a bad power supply. I did repair this model once, in that case it was a bad signal board. I would certainly think that the power supply is at fault in this case. This would be more common than a signal board. I wish I could provide with a complete repair. I would investigate with my first option. Thanks for asking and show all hands of support!

Sep 01, 2011 | Sony BRAVIA KDL-52S4100 52 in. HDTV LCD

1 Answer

Th42pd25 light blinking 12 times


Your power supply is not getting enough voltage to come on! I would certainly inspect the power supply for bad capacitors. I have not repaired this unit in particular. Most cases direct me to check the voltages in the power supply. Please find an ESR meter to locate these bad capacitors. The power supply board is the board that has the fewest components, contains the glass fuse and is the heart of operations.. Most cases will say we are on the right track for repair. Show all hands of support! Thanks for listening.

May 02, 2011 | Televison & Video

2 Answers

I wntt to access the power supply fan on my cq2009f desktop. I can remove one side and the front but it appears that I need to remove the rest of the case and this looks like it is riveted to the chassis....


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.

Feb 03, 2011 | Computers & Internet

1 Answer

My boyfriend's tv won't turn on.. He says when he tries to, the tv's red light just keeps flashing at him. Have any idea whats wrong with it?


Sounds like a power supply failure... probably caused by bad capacitors on the power supply board.

the power supply board can in some cases be repaired, but in other cases will need replacement.
Apower supply repair is likely to cost around £80 and a new board can be between £80- £200 depending on make model.

Sep 01, 2010 | Televison & Video

1 Answer

Need a power supply for a yt32ano63001512. where


In some cases the power supply can be repaired. This may be your only option if the part is unavailable. do you have any local repair shops you can take the unit to?

May 08, 2010 | Protron PLTV-32 Television

1 Answer

Smells like hot electrical from the power supply. which way should the round fan face in the case? Towards the motherboard or out the top. Ran system check, it is not hot. I thought it might be new and...


Is this a new ATX switch mode power supply?
If the ATX power supply is old then the capacitors may leak and overheat to give a burn't smell. I would not advise you to try and repair these power supplies, they operate with dangerous mains voltages inside the case.
The ATX power supply has standard mountings holes that line up with the desktop case and can only be fixed to the case in one position.
If you have overheating problems you can add addition 12volt fan inside case, The fan should be positioned to draw air into the case.

Dec 04, 2009 | Dynex 400-Watt ATX CPU Power Supply

1 Answer

Hard drive will not power ON


I have had my own experience with Western Digital and their policy is to not sell or provide parts in order to replace damaged parts in an otherwise functional device.

Your options would be to send it in to WD for a repair and strictly a repair. They may replace the power supply.

The other option is to buy a used/off-market case or power supply which matches your drive's supply.

I had a harddrive burn a hole through one of the interface chips on the bottom of the HD and was told there was no way I could get it repaired or recover the data as it was. However, I found an exact match for model and type of the drive and a near enough year to the one I had and exchanged the interface boards on the drive, and I'm using the drive today as my main boot disk.

All you need to do is replace the power supply. Try Ebay for your external drive model number, there may be cases with no drives which you could buy that have functioning power supplies, or power supplies alone.

If all else fails, you can do what I did - buy another, matching product, exchange the broken part from the new one you get with the old one, recover data, and swap the power supply back again, then send the old drive to WD for replacement. You can attempt to resell the RMA'd (returned to WD drive) on amazon/ebay and use the new one, or keep the new power supply in the old device and use it, and sell the drive out of the case, or keep the drive and use it. I expect the drive inside the external case should work as a normal drive.

Dec 16, 2008 | Western Digital 500GB My Book Pro-External...

1 Answer

Apple g4 digital audio Power supply API-9841


Solution: Replace power supply with a new one. Anything else might cause equipment damage, personal injury or death.

Any attempt for component level repair is not for the novice tinkerer. remember, opening the power supply might kill you.

My suggestion is to have the failed power supply module replaced with a brand new supply by a qualified repair technician.

Jul 24, 2008 | Apple G5 Case with Power Supply (p/n...

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