Question about HP Compaq Presario SR1430NX (PS566AA) PC Desktop

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Ihave a power supply unit with a transitor m0324 which has shorted. i cant find its replacement. can u help out?

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I fond tour power supply at this link:

http://www.com-com.co.uk/HP/parts/PS566AA.ihtml

Posted on Mar 02, 2009

  • Larry Rider
    Larry Rider Mar 02, 2009

    Before ordering part click link:

    http://h10025.www1.hp.com/ewfrf/wc/docum...


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Ihave a 19" sharp flate pannel tv was playing and turned itself off now ihave no standby lite and tv wont turn on manually or with the remote


Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time.

Sep 13, 2014 | Televison & Video

1 Answer

Sony srt 750p transitor problem


Transistor Problem


To replace the power transistors ( MN2488 and MP1620 )

• you need to have a technique in soldering.

( much faster is cut the transistors pins , but be careful only for

professional serviceman )


click on the link below:


Soldering Guide

After taking out the burnt transistors:

• get a multimeter and measure the DC voltages present on

each amplifier output stage ( center of the two resistors in series ).

• • it should be no more than 0.7 V, if it s, remove those pair of power

transistors and test again for output voltages.


the negative probe

of the multimeter to the chassis of the unit.


• Do not connect new power transistors yet.

you may need to power it without it.


Until you sure that the unit powers up and have some/other channel

working to prevent further transistors and components failure.





But if there are still more than 0.7 v on some of the outputs


• Check for VAS circuits and Differential Input Stages



Let me know how you make out with the inspection.

It is a good chance you will find something.


hope this helps, thanks for using Fixya!

Aug 09, 2012 | Sony Audio Players & Recorders

2 Answers

Power supply transistor transistor no. C4237 replaced 4 times. each replacement didnot sustain for a week. which transistor can i use instead.


I have worked to repair a few of these. When the transistor is burned, you most likely have a bad flyback transformer and bad picture tube. In this case you replaced this (transistor) component four times. This TV cannot be saved. Thanks for asking.

Oct 19, 2011 | JVC AV-24F704 24" TV

1 Answer

Why is my HP vs17e monitor blue power light blinking?


the blinking of power led means that the power supply is not working fine, this can be caused by:
  1. a puffed capacitors in the secondery side of the power suplly
  2. a shorted transistor in the inverter section
  3. a damadged flyback transformer in the inverter section
to solve the problem, unplug the LCD from the power source, wait for 30 mn to discharge the main filter capacitor (150 uf, 400 V), look at the capacitors, if they looks good, check the transitors, if you find a shorted one (0 ohm read) change it. don't forget to test the continuity of the flyback transformer (primery and secondery). i hope that this will help you to solve the problem.

Dec 12, 2010 | HP Vs17 17" LCD Flat Panel Monitor

1 Answer

No power ticking sound when plug into outlet


Hello

Your Philips Tvs line output section has some trouble with it. All philips power supply circuits are so designed that, even a small short circuit in the ciruit board occurs, the power regulator will sense it, and the entire system will shut down, and that is happening now in your TV.

You just start with the horizontal output transistor, fitted very close to Line Output Transformer [LOT], for any short. You must desolder it out from the circuit for this check, and check it for collector to emitter leak. If this will happen, the main regulated power supply ie 120VDC, will gets shorted through this transistor, cause a dead short circuit. If it is shorted, you must find out the reason for that short.

If LOT said above has damaged, this transitor will also get shorted. In otherwords, if LOT is damaged, its driver transitor,will also will get leaky. You just replace this transitor with an identical one. Switch on the tv for a while, say 10 seconds or so, check its heat effect. If it heats up abnormally, surely LOT has damaged, and you should replace it also with an identical type and number. Ok

Nov 24, 2010 | Philips 32PT563S 32" TV

1 Answer

So I connected 8 speakers to this system and I might have blown it out. when i connect it the red standby light comes on. then when i press the power button the screen goes blank as if turning on but...


Audio output shorted out or blown fuses in power supply check all fuses if fuses are good your Audio out put transitors or I.C has been shorted out as a result of impedence over load in future dont connect speakers in parallel in those small Audio units.

Natureisland technician

Commonwealth of Dominica

Nov 06, 2010 | Sony CMT-HP7 CD Shelf System

1 Answer

No spark


You'd need to track down a wiring diagram to be certain, but usually the power feed for the coil comes direct from the ignition switch contacts. If you take the steering column shrouds off and measure the resistance across the switch contacts that supply the coil, there should be very little resistance there. If there is more than a few ohms it's best to replace the ignition switch. Also check the power supply to the switch and compare with power out, if it drops a lot, then the switch is at fault (might be easier to do this than measure resistance).
Hope this helps, Mark

Dec 02, 2008 | 1994 Mazda 323

3 Answers

Dell Monitor repairing trobleshoot


check the circuit of secondary line 1st check the all dioed must be shorted. then replace the horizontal transiistor out put.

Apr 18, 2008 | Gateway FPD2275W LCD Monitor

2 Answers

RCA Model F36450 Chassis ATC113CA1 won't power up


No sir it probably isent a power supply problem as in these sets it wouldnt act like that. First thingm to check since you say your a service tech, is in the horizontal output check and see if the horiz. output transistors shorted. If its not then check a small coil off the base of the horizontal output transistor. its really the base drive coil so take it out and scrap off the ends BOTH ENDS and reinsert and also resolder the horizontal driver transformer. This may or may not fix your problem But if it dosent order if you think ther sets wrth it the flyback transformer as this is a big problem in these sets if the for mentioned things did do the trick. follow the kit instructions that come with the flyback transformer!! Dont take any short cuts. Make sure you do take out the horizontal output transitor or at least unsolder all the leads when tesating it for a short. Good luck

May 21, 2006 | RCA F36450 36" TV

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