Question about Dell H275P01 275Watt Power Supply

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Wrong voltage settings on power supply - Dell H275P01 275Watt Power Supply

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What do u mean?
Please clarify to answer
I have repaired dell 745 supplies

Posted on Aug 26, 2014

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Posted on Jan 02, 2017

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Testing power supply for Samsung UN40H5203 TV


If you have no power at all out of the power supply board, then either the incoming fuse is blown or the power supply board is toast. Part of the board has to be powered all the time waiting for a signal from the on button from the TV or remote. Remember check for AC and DC voltages at the appropriate places because if you check with the wrong setting on your multimeter you'll get 0 volts.

BE CAREFUL WITH THIS BOARD AS THERE ARE HAZARDOUS VOLTAGES EVEN WHEN THE TV IS UNPLUGGED!!!! (and even if it's not working! The capacitors can hold a high voltage charge for weeks!)

Sep 08, 2016 | Samsung UN40H5203 40 Inch 1080p Smart

1 Answer

Turns on. Shows channel icon on screen but never brings channel in then shuts off on its own and turns on again by itself. What's wrong?


Is it possible a fuse is blown or the circuit board is fried? Did you use a power supple with a higher voltage then the TV needs? If so, replace the boards and the fuse, than use a correct power supply. DO NOT USE A POWER SUPPLY THAT HAS TOO HIGH VOLTAGE! Check the label on the back/side of the TV. Fine where it says "input". then take note of the voltage number. Then, check your power supply. When you look at the power label on the power supply, look at the voltage on the output part of the label. If it is higher then the input voltage on the TV, DO NOT USE THAT POWER SUPPLY! IT COULD DAMAGE THE TV! Hope I helped!

~Conner

Nov 28, 2015 | Televison & Video

1 Answer

Wd-65735 low lamp voltage issue.


be aware the set uses two grounds, one hot and one a earth ground and if you are measuring from the wrong ground you get wrong readings.

do the self check the set has to see if you have a error code.

Sep 02, 2012 | Mitsubishi WD-65735 Television

1 Answer

Hitachi 57s715


It is a rear projection with 3 picture tubes.

If the power light comes on and stays on but no picture/sound the trouble is likely in the power supply.

This set like all Hitachi projection sets before it going back to 1991 has several led's on the board (power) that when with the back off and you plug in should be lit. At turn on you watch them all to see if they come on and if one goes out first before the others--all should dim down and go out together if set unplugged. There is also on most versions a red one that is on all the time.

The red is tied to where the voltage first inputs the set. The others are each connected to several different lines coming out of the set's power supply. If one does not come on or goes out last it indicates a problem on that voltage line---for example a 24 volt line goes to convergence (2 of those lines and one + and one - voltage.)

This is how to narrow down what is happening. If the red one does not come on at all (almost all have that one) none will and that one means right where your house voltage comes in something is wrong.

Questions?

Apr 20, 2012 | Hitachi Televison & Video

1 Answer

My monitor is unresponsive. Does not power on anymore. Does anyone have any troubleshooting ideas?


If your monitor uses a power supply (the brick that plugs into the wall, and then a smaller cord plugs into the monitor), then it's more likely the power supply that's gone out than the monitor itself.

Find someone with a multimeter to check the output voltage on the power supply. There will be a label on the power supply that says what the DC voltage (VDC) is supposed to be. If the meter shows no voltage when the power supply is plugged into the wall, then you just need a new power supply.

Do not try using another power supply as a substitute unless it is a specific match to your monitor. They vary widely by output voltage, etc. and using the wrong one could fry your monitor.

Hope that's helpful.

Jan 14, 2011 | Dell E207WFP LCD Monitor

2 Answers

The t.v powers on for just a second and clicks off. I can hear a click from the back and it recycles off/on over and over.


open the set remove all but the ac cord connectors from the power supply; label them first! turn on the tv if the power supply does not recycle turn off the set and, connect and, disconnect each cable one at a time going to the power supply turning the set on and, off each time as you test until the power supply cycles (fails) again then repair or, replace the circuit board that causes the power supply to fail. if the power supply cycles on and, off (fails) with all connectors but, the ac cord disconnected repair or, replace the power supply.

Jul 19, 2010 | LG 42PC3D 42 in. Plasma Television

1 Answer

MY RCA 27" WILL NOT TURN ON, HAVE POWER TO THE FUSE, THE FUSE IS GOOD ALSO BUT THE DEGAUSS RELAY DOES NOT CLICK AND NO OTHER CLICKS ARE HEARD EITHER, WHAT COULD BE WRONG?


you need to check the voltage output of your power supply section.This power supply supply is a switching type power supply.there is a chopper transformer in there.its supply is a dc voltage unlike any other transformer which is AC supplied on the primary..First step.
1.Using a multitester measure the primary supply it is a DC voltage around 220v - 110 VDC
2.Measure the secondary output.The out put is AC voltage the supply for the B+ going to plyback is 115vdc the second output is 12v run through a regulator and the regulator lower the voltage to 5vdc.this 5vdc supplies the system IC and the jungle IC.this ic process the switching of the plyback transformer and the plyback transformers output supplies the voltage of the whole system including your relay in the degaussing section....once the plyback is activated the tv will now turn on...

good luck!Hope i helped you..

please rate my help..god bless!

Jun 13, 2010 | RCA F27641BC 27" TV

1 Answer

Wrong power supply was plugged in...won't power up...is there a reset?


No there isn't a reset.
If you plugged in the wrong power supply then you could have damaged the electronics, especially if it was the wrong polarity and/or a voltage that was too high for the hard drive.

Oct 17, 2009 | Western Digital Computers & Internet

1 Answer

Completlly stop working after wrong polarity lead been plugged In


one of the first things that go are is the protection diode coming off the + input. Then a fuse and so on. Surface mount fuses are light in color (usially green with white text). Attempt to bypass these components with a small wire or paperclip. Once you follow the lead from positive input you will run into a black rectangular block about the size of a grain of rice with 3 leads. That will be your voltage regulator. Its set at the correct voltage, and since you already have a power supply with a set voltage, then you dont need it. Its also the first thing that blows when you switch polaritys. (voltage regulators have 3 pins - input output and ground) when you switch polaritys that ground becomes the "input" and ..... go to all http://www.alldatasheet.com/ and type in the text you see on that component. It will then identify the component and list its voltage output and at which pin.  Apply set voltage to lead and ... pray? 

Best of luck.

May 25, 2009 | Panasonic NV-DS60 Mini DV Digital...

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