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Will not power on at all. What could be the cause?

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RE-WIRE THE ELECTRICS BY THE MANUAL.

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1 Answer

Dyson DC 25. The roller brush will not engage. What can I do.


It may need a new belt, a new power nozzle motor or the whole nozzle housing needs replaced. It also could be the power nozzle is not getting power from the vacuum which could be a short or bad switch. There are many areas that one or more could be causing the problem. First determine if the problem is in the power nozzle itself or the vacuum then eliminate the possible causes one at a time until you determine the cause. It's much more difficult to find the cause if there is more than one issue causing the problem.

Mar 24, 2016 | Dyson Ball DC24 Bagless Upright Vacuum

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Hp slimline s 3000 wont start green light for ps goes off when start button pushed


You seem to have eliminated the PSU as a cause of the problem.

It might be that there is short circuit somewhere in your case, possibly one between the m/b and the case. This could cause your PSU to shut down (if it has s/c protection). Holding the power button for more than a few seconds would cause a power down (mine is power on when the button is pressed, but pressing again/continuing to press for 5s causes power down: to power down, the power button must be pressed for the 5s - to prevent accidentally pressing the power button from switching your machine off by touching the power button).
If this is the cause, probably the only way to solve it is to remove the m/b from the case and clean out the case and the m/b, the latter with canned air perhaps. (you should inspect the surface of the m/b for objects which might be causing such a s/c, but most likely any object has become lodged behind the m/b. Some computers allow removal of both side panels) Be careful during re-assembly because some m/b-cases require (either insulating or conducting) spacers/stand-offs between the m/b and mounting points in the case.
Of course, there may be another cause...

13.April.2014

Jul 08, 2012 | HP Pavilion Slimline S3123W Desktop PC -...

1 Answer

Tv turns off red light blinks 9 times


Sony tv led and blinking codes

  • 0 times, Diagnosis: Power does not turn on. Possible causes include: Power cord is not plugged in, Fuse is burned out (F6001) (G board). Symptoms of the problem: Power does not come on, No power is supplied to the unit, AC power supply is faulty.
  • 2 times, Diagnosis: B overcurrent (OCP). Possible causes: H. OUT (Q8024) is shorted. (D board), +B PWM (Q8035, 8038) is shorted. (D board) Symptoms of the problem: Power does not come on, Load on power line is shorted.
  • 3 times, Diagnosis: +B overvoltage (OVP). Possible causes: IC501 is faulty (G board), IC5002 is faulty (G board). Symptoms of the problem: TV has entered standby mode.
  • 4 times, Diagnosis: Vertical deflection stopped. Possible causes: +- 15V is not supplied. (D board), IC8003 is faulty. (A board) Symptoms of the problem: TV has entered standby state after horizontal raster, Vertical deflection pulse is stopped, Power line is shorted or power supply is stopped.
  • 5 times, Diagnosis: White balance failure (Not balanced) Possible causes: Video out (IC7101, 7201, 7301) is faulty (CR, CG, CB board), CRT drive (IC309) is faulty (A board), G2 is improperly adjusted. Symptoms of the problem: No raster is generated, CRT cathode current detection reference pulse output is small.
  • 6 times, Diagnosis: LOW B OCP/OVP (Overcurrent/over voltage). Possible causes: +5 line is overloaded. (A, B boards), +5 line is shorted. (A, B boards). Symptoms of the problem: No picture.
  • 7 times, Diagnosis: Horizontal deflection stopped. Possible cause: Q8035, 8038 is shorted. (D board)
  • 8 times, Diagnosis: High voltage error. Possible cause: T8005 is faulty. (D board)
  • 9 times, Diagnosis: Audio error. Possible causes: +- 19V line is shorted. (A, B boards), IC708 is faulty. (A board), PS701 or PS702 is opened. (A board). Symptoms of the problem: No sound
I hope this will be of some help to you

Mar 22, 2012 | Sony Televison & Video

1 Answer

My Maytag Neptune Dryer stopped running & is


as per heatman The most common cause of your appliance giving you the PF error code is a problem with the power coming in from your utility company. Of course if there is an interruption of power, and then the power comes back on you will get the PF code Loose wires going to the circuit board or the control can also be a cause of the error code. If a wire terminal end happens to get corroded or loose, the vibration from the machine can cause slight power problems and this can cause the PF code to be displayed. Finding the cause of this type of problem is like finding a needle in a haystack. Sometimes you can cause it to be displayed by banging on the side of the appliance or slightly moving the wiring harness, to see if you can get the error code to display.

The bottom line about this power failure error code, is that it is power related. Finding the exact cause can be difficult. If you are continually having to reset the appliance then check to see if all of your appliances are giving the same code. This will indicate utility power problems. If only one appliance is giving the PF code then it is probably internal to the appliance.

Jul 12, 2011 | Maytag Neptune MDE5500AY Electric Dryer

1 Answer

Sony kp65wv700 tv blinks 7 times - Horizontal deflection issue is what manual is telling me. My question is what transistor/chips I need to replace and if anyone has done that to fix this problem...


Here are the fault codes for your tv and what components are affected:

  • 0 times, Diagnosis: Power does not turn on. Possible causes include: Power cord is not plugged in, Fuse is burned out (F6001) (G board). Symptoms of the problem: Power does not come on, No power is supplied to the unit, AC power supply is faulty.
  • 2 times, Diagnosis: B overcurrent (OCP). Possible causes: H. OUT (Q8024) is shorted. (D board), +B PWM (Q8035, 8038) is shorted. (D board) Symptoms of the problem: Power does not come on, Load on power line is shorted.
  • 3 times, Diagnosis: +B overvoltage (OVP). Possible causes: IC501 is faulty (G board), IC5002 is faulty (G board). Symptoms of the problem: TV has entered standby mode.
  • 4 times, Diagnosis: Vertical deflection stopped. Possible causes: +- 15V is not supplied. (D board), IC8003 is faulty. (A board) Symptoms of the problem: TV has entered standby state after horizontal raster, Vertical deflection pulse is stopped, Power line is shorted or power supply is stopped.
  • 5 times, Diagnosis: White balance failure (Not balanced) Possible causes: Video out (IC7101, 7201, 7301) is faulty (CR, CG, CB board), CRT drive (IC309) is faulty (A board), G2 is improperly adjusted. Symptoms of the problem: No raster is generated, CRT cathode current detection reference pulse output is small.
  • 6 times, Diagnosis: LOW B OCP/OVP (Overcurrent/over voltage). Possible causes: +5 line is overloaded. (A, B boards), +5 line is shorted. (A, B boards). Symptoms of the problem: No picture.
  • 7 times, Diagnosis: Horizontal deflection stopped. Possible cause: Q8035, 8038 is shorted. (D board)
  • 8 times, Diagnosis: High voltage error. Possible cause: T8005 is faulty. (D board)
  • 9 times, Diagnosis: Audio error. Possible causes: +- 19V line is shorted. (A, B boards), IC708 is faulty. (A board), PS701 or PS702 is opened. (A board). Symptoms of the problem: No sound

Feb 26, 2010 | Sony KP-51WS500 51" Rear Projection...

1 Answer

I have a samsung hcn4226w no power at all even to power button.


Yes,the STKs can cause set to shut down, call Mats Electronics 1-800-628-1118
STK392-020

Feb 25, 2010 | Samsung HCN4226W 42" Rear Projection...

1 Answer

Oven resets (like power failure) frequently - either while pressing buttons or while cooking food. Approx 5 yrs old - problem just started.


Hi.


The following parts may cause this problem and must be tested:

Control Pad: This is most likely the problem , testing the contol pad is quite complicate.

Door lock: A defective door lock can cause the magnetron and turntable motor being turn off erratically. This wont cause the program to reset.

Power cord and power connection solder joints: this can cause a microwave restarting because vibration caused by the oven working cause power interruption.

A bad shielding to controller board can also cause the microwave resetting because of the interference caused by magnetron on control board circuits. This is also quite common.

The control pad or control board are the parts that are most commonly causing this problem.

Dec 14, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

Kenmore F-01 error


Hi there,

The F01 fault code is indicating an EEPROM error or a PUMP DRIVER error. A communication error between the Central Control Unit (CCU) and the EEPROM on board the CCU occurred.

Possible causes of an EEPROM error:
A power glitch may have caused this error. Unplug the power cord for 3 minutes then reconnect power.

Possible causes of PUMP DRIVER error:
The pump driver fails to activate. Replace the the CCU board.

Most likely the CCU board will need to be replaced.

Good Luck!!

Thanks

Apr 22, 2009 | Kenmore HE2 Plus Front Load Washer

1 Answer

No picture


LCD TV TroubleshootingThe defective LCD TV may have the following common symptoms:

Symptom: No picture on screen but LCD TV still has sound.
Solutions: The problem is cause by defective inverter. Replacing ivnerter will solve hte problem. Symptom: Screen flash on and off between 1/2 to a few seconds, but power indicate light stays on and TV still has sound.
Solutions: The problem is cause by defective inverter. Symptom: Blue Screen but no picture
Solutions: The problem is cause by defective Main Board(AD Board). In some cases, this problem may cause by the defective Screen Controller board. Thsi board is mounting on teh back of LCD TV Scree. Symptom: Power light stays on but no display and sound
Solutions: The problem is cause by defective Main Board(AD Board) or Power supply board. Symptom: No Power or Power indicate light does not lits
Solutions: The problem could cause either by defective Power supply board or defective Main Board(AD Board). Symptom: Screen is half dim and half bright
Solutions: The problem is cause by defective LCD Panel.It needs to be replace.

This is a power supply problem. Try to check the fuses ,fusable resistor ,capacitor and transistor in power supply board.

Hope it may help you;

Regards,
VOTIT

Oct 01, 2008 | Olevia LT37HVS 37 in. LCD HDTV

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