Whenever the laptop is turned on, it makes a high pitched squeal like a capacitor dischargind, someone told me that it was the dc converter board, if this is true where can i get the part for replacing this and is it easy to fix.
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The high pitch sound may be the power supply adapter, unplug let it run on battery, if sound goes away change the power supply, the laptop keyboard will need to be replaced, go to www.ebay.com Type make and model of laptop, refine search to keyboard and power supply if needed.
The high pitched noise you hear is most likely caused by the CPU cooling fan on your laptop. If you suspect that this high pitched sound is caused by the fan going out, you can spray your laptop with compressed air to get the dust off of the fan. This solution will make your laptop work at a cooler temperature, and reduce the noise.
If the problem persists, seek a certified laptop repair specialist.
Yes! unfortunately it is, the reason why the power adapter has the high pitch noise is because the power supply is being loaded down by the motherboard, it may be due to the DC jack in the laptop or the charging circuits on the motherboard causing the problem. However there is one way to find out, remove the main battery to see if the high pitch noise goes away, if it does! it will prove where the problem is. It is also very possible that the battery is loading the whole circuitry, because it may have a high resistance short, enough to cook the power supply, I have seen this in very rare cases and is one for the books.
The problem might be the power supply charger that plugs into the laptop, unplug the charger and run the laptop on battery power, is the high pitch sound there when you power up? if this solves the problem, it is the power supply charger that is the cause.
Are you getting a high pitch screaming or a grinding noise? The Fan on the heatsink sometimes getting clogged with dust and over time this can cause the computer to turn itself off. Dependant on a high pitch scream this could be a number of problems, memory modules loose or faulty?? Would need more info about the type of sound..
High pitch noise usually means the inverter board that drives the lamp behind the LCD display. If the rest of the laptop appears to work, for example, hard drive light blinking while booting, try hooking up an external monitor and hit whatever function key that switches you to the external monitor. If everything works, you may want to replace the inverter board yourself. It is not horribly hard if you are very careful. But it is not exactly a walk in the park kind of work.
If the rest of the laptop does not appear to work, the DC-DC step down power circuit is probably shot, which will also make a high pitch noise. In this case, you will have to replace the motherboard. Replacing a motherboard is a major pain in the behind. In most case, it is not worth the trouble if you have an older model.
The usual cause of microphone noise is caused by audio settings where the microphone gain may be turned up to high causing it to pick up noise from the computer or built in speakes. This can cause noise ranging from an odd hum to a high pitched squeal.