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Do you have a circuit diagram for the switch mode power supply as there is a common faulty causing the ps u to shut down

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My Computer Screen is stuck in power save mode. I have disconnected it shut down and rebooted. And still the same. Unable to do anything on computer. Help

Hi Faith
More than likelly the Switch Mode Power Supply board is not powering up. Often caused by bad or leaky electrolytic capacitors.

Nowadays, the switchmode power supply module converts the incoming AC power to the lower DC voltages required by the other circuit boards.
It uses lots of Electrolytic Capacitors to clean up noise in the DC power. But one Electro Cap is used to store a charge for turning on the switch mode power supply. Being Electrolytic they are prone to leaking & bulging so they don't do their job. They won't hold a charge. By pulling the plug and restarting, you have found a way to overcome the problem. But only temporarily. When the Cap goes fully bad, you won't be able to start the TV any more. Suggest you order a switch mode power module for it or take it to a tech who will replace the module. It's usually in a metal shielded small box full of ventilation holes.
I have repaired many switch mode PS but most tech's these days don't bother. They just get a replacement board

If you have the technical ability you could find the faulty part, unsolder it and replace with a new one for $1.50

Otherwise take it to a technician.

Good Luck

Switched mode power supply

How to Replace an Electrolytic Capacitor

Feb 24, 2016 | Computers & Internet

1 Answer

Want the circuit diagram for ps 5161 7d

you could get the circuit schematic drawing from this site.
DELL PS 5161 7DS POWER SUPPLY SCHEMATIC Service Manual free download...
After clicking on the link wait a few minutes and then scroll down the page to the Get Manual link.

Sep 23, 2014 | Computers & Internet

1 Answer

Hello I am from Greece Crete can I find electronic diagram or service manual for dell PS 5201 7D power supply

If your Dell switch mode power supply is faulty then I suggest you replace it with a new one that is the same wattage or higher wattage.
Fixing faulty ATX power supplies is not a DIY project, there are dangerous voltages in these power supplies and can cause death or serious injuries.

Feb 04, 2011 | Computers & Internet

1 Answer

How to repair the dso power supply ? is there a circuit diagram ? thx

repairing a power supply do not need a diagram often faulty on a power supply are the regulator transistor,capacitors,resistors,and diodes. just check these parts and you can fix the power supply.check also for loose contacts and connectors this also cause a fault on the power supply.

Jan 18, 2011 | NetGear ProSafe JFS524 24-Port Ethernet...

1 Answer

Toshiba VCR V-e41A fails to switch on . The fuse is intact. need circuit diagram to repair. please suggest
Above is a VCR Training manual, this is what is used to teach the Engineers how to troubleshoot and repair these types of units.

Usually in these units, it is either the Power Supply is faulty, or, Check the Mode Switch, these are common causes of NO GO. One MUST ALWAYS start at the PSU, as if the Voltages are NOT correct there nothing else can be.
Above is a DIY troubleshooting and repair website for the VCR.

Jul 22, 2010 | Toshiba Televison & Video

1 Answer

VisionQuest Van gogh Plasma 32''. The standby light shut down. No power on has possible. I check the 3 fuses inside the TV and all is good. Someone know what is the problem !!!! Tks

Good day sir, your tv or any new tv are now using SMPS or technically called switch mode power supply, a regulator mode that is more efficient than traditional power supply, the down side is that its prone to defects, there are three main parts the Switching element which is the transistor, the oscillator circuit which is usually an IC that controls the frequency of oscillation and the high freqency power transformer that works with the switching transistor. All of these parts are need to be checked to ensure proper operations. SMPS also detects overload, which is caused by faulty parts on your tv, unless that faulty part is not found, it will not start and go on standby mode, worst will always shuts down. Call your dealer on how to go about your tv problem or have it check by a qualified technician.

Nov 03, 2009 | Televison & Video

1 Answer

I have a Compaq Presario SR5233WM PC. My problem is the tower over heats and does an auto shut down. Has anyone else seen this before?

This happens when the CPU overheats and shuts down (ie thermal overload) and won't boot up again until it has cooled down. If the problem is not rectified, eventually the CPU will fail.
The problem is caused by a faulty CPU fan and or the fan and heat sink assembly is clogged with dust. The switch mode power supply fan may also be faulty or clogged with dust.
Check the CPU fan, if it does not spin freely then replace it. Also loosen and vacuum the dust off the heat sink.
Check the switch mode power supply fan, if it is faulty replace the fan or better still replace the power supply.

Oct 09, 2009 | HP Presario V6420US PC Notebook

1 Answer

When we try to turn on the tv, it chirps and shuts off

Power supply (switched mode) is shutting down due to either a fault within the power supply itself, or a problem in the line stage (EHT) and the current protection circuit is shutting down to prevent further damage. Flyback diode often fails shutting the power supply down.

A circuit diagram is required in order to repair this.

Sep 12, 2009 | RCA HD52W59 HDTV Projection Television

1 Answer

Short burst of power

Most likely you have a bad power supply, or a short or overload that causes the power supply to shut down. You will need a DVM (digital volt-ohm-meter). Using the DVM and the instructions on the PS, unplug all PCI boards and all wires on the HD's. There should be a point where the PS will not shut down. Then you will have to install all the connections one by one, until the PS shuts down. You will have to turn off the computer for each of the connects and each of the re-connects or you are exposing your computer to a great danger. CONSTANTIN (arzconst)

Jul 31, 2009 | EliteGroup KM400-M2 Motherboard

1 Answer


A capacitor doesnt blow of by itself the connecting components may be faulty check resistors dides and transitors in the power supply for change in value leaky or any other defult

Oct 27, 2007 | Jetway V266B Motherboard

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