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WHEN I TURN POWER ON THE FAN COMES ON BUT NO DISPLAY. FAN IS RUNNING ON HIGH

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Try swapping your ram from one to the other. It is either bad ram, bad CPU, bad motherboard. The ram is the easiest to test.

Posted on May 31, 2010

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Frigidaire prof. series microwave PLMBZ209GCA not working. Display comes on. No sound (fan). Dont know if microwaving function is working properly or not. Any suggestions?


Two things could have happen to your machine.
One the magnetron is dead and needs replacement.
Second the high tension power which supplies power to the magnetron could have been screwed up and need to be replaced or repaired.
The fact that the fan is not running I suspect it may be a power board issue.

Apr 17, 2014 | Frigidaire PLMV169DC Microwave Oven

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Oven rarely comes up to temperature Maytag MGS5870ADC


It seems to be thermal issue .

Check thermocouple .

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When I turn the furnace on the ac comes on also.


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If you have both heat and ac running that means that the Yellow , AC and the White heat circuits are both being energized with the Red 24 volt hot leg that enters the tstat on the R terminal, note the Auto fan switch between Yellow and Green if Normally closed that is the Auto setting and high speed fan comes on for the Cool mode via the fan relay,
while the Heat speed is low speed and controlled not by the fan relay but the temperature or time delay, you need to determine what speed you have running now, low or high? if you flip the fan switch to ON and it speeds up then it was on low, if it makes no difference you have high sped running already.

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The fan inside my renault megane scenic will not switch off


The fan speed relay has fused contacts keeping it in the high speed mode. It needs to be replaced.

Jul 28, 2017 | Renault Megane Cars & Trucks

1 Answer

The word PROTECTin display


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on; or it may turn on but produce no audio to the speakers.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as another possible root cause for intermittent shutdown.

Nov 11, 2011 | Teac AG-D9100 Receiver

1 Answer

I have dell 3300mp,when I turn the power on it makes a very loud noise. It does not make the sound in standby or cool down. It does work and display a signal okay, but it is very loud. Sound like a fan?,...


The main fan that cools the lamp is mostly high speed when the unit is running. when it shuts down it slows the fan down, until it stops in standby. So the noise is only really loud when it is showing a picture.

try setting the fan to eco mode (slower running) and see if the noise is acceptable. If it is still too loud then you will have to replace it. Have a look at the fan and see if any of the plastic blades are missing.

Mar 26, 2011 | Dell 3300MP Multimedia Projector

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Hey my emachine fan was running and the monitor was not coming on so i off it and spary the board with crc cleaner and now my pc fan comes on but the power signal is off and the monitor is still off


The full motherboard breakdown will be evident if the pc will not come out of the yellow standby light on the screen. The other symptoms here will be the pc may sound as though it is running. This is assuming the power supply has not partially blown. The CPU fan will be seen to be running, the hard drive and cd rom lights will be glowing, and the hard drive can be heard running. The obvious point will be that in these circumstances the pc will show no signs of a display on screen.

What will have happened here is that the motherboard processor socket will have become inoperable. This is a non repairable item, but means the motherboard must be replaced for an effective and full repair.

The cost of this may sound worse that it actually is. The High Street stores will quote you inflated repair figures, when in truth the repair can be carried out by you with my instructions in under and hour and with full effect.





DIRECTLY from my own searching for my problem, I found this WEBSITE

Dec 25, 2010 | AMD eMachines Desktop System w/ 17'' CRT...

1 Answer

My fan also has quit the assembly is new so i


Use a known working relay of the same type and turn on your a/c on high, then put in the relay where the old high speed fan relay was. If it comes on, it's the relay. Try this on low speed as well. If they don't come on when the A/C is on, it could be your pcm/ecu as well. If it doesn't communicate with the sensor, it won't turn on. Check with A/C running to narrow it down. If they work here, look into the engine coolant temperature sensor.

Jul 17, 2009 | 1999 Chrysler 300M

1 Answer

Boiling waer under micro wave lots of steam into micro wave, turn on micro wave ,pop noise like glass miro wave comes on louder hum than normal no heat


Q - The microwave display counts down and the inside light is on,  but nothing is heating and the fan is not running.
A - This most commonly is a bad door switch, other possible problems are a faulty relay or solder joint on the power module, but a bad door switch is most common.
 Q - My microwave is running and sounds like it is working but will not heat up anything.
A - Many thing can do this but, common things are....loose high voltage wire.....poor solder joint on board.....magnetron.....power relay.....
Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
A - 9 times out of 10 this is usually this is a bad magnetron, the other time is sometimes a bad high voltage diode. See components section.

Mar 03, 2009 | Amana Radarange Microwave Oven

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