- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
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.
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.