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If your main power fuse was blown, there would be no power at all. You may be looking at a blown preamp or an overheated component inside your receiver. You may want to take it in to a service technician. Have you tried to contact Philips customer service?
Most likely the unit does not receive power from main transformer. Possible several reasons:
- bad power transformer
- bad main internal fuse 7-8amp. Bad fuse most likely because of one of the channel is blown and shorts the power, so before installing new fuse good idea to check all channels by meter or at least visually for burned parts
- bad power relay
- bad connection, cracked soldering joints
It's not a fuse. Fuses don't self-heal allowing another try.
Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
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 'naked'. 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 a possible root cause for intermittent shutdown.
unplug everything that is pluged into the reciever. plug the power cord into an outlet with nothing else pluged into it and try it again. if your electronically experienced you could try to ground it and carefully try it again. give the unit a smell, does it smell a little burnt? if you have a screw driver and a little trust in yourself tale the cover off and look at the board for visual burn marks there should be fuses inside the unit, you could check those out. If you dont see anything visually wrong and it is still not powering it would be a good idea to bring it in to an electronics repair shop and they could diagnose the problem. With the use of a volt ohm meter it would not take long.
Hi Hibbs8829 Generally fuses are located on the PCB attached to the power transformer terminations. In some instances the only primary fuse may be a thermal fuse located inside the power transformer that may have failed. This one you cannot see from the outside. They are replaceable, but you will need to get into the transformer somewhat to sort it out. Other than that, there are often fusible resistors and circuit protector devices on the PCB. These can be a little difficult to find if you don't know what you are looking for. Good luck
Stereo Tech: yes their is a fuse inside that possibly opened, but does the unit show PROTECT across the display? if not you may have goten lucky and just did a fuse small PC board just behind the transformer. Good Luck