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High pitched squeal

post #1 of 5
Thread Starter 
So I'm sitting here replacing the HDD and re-installing Ubuntu on my wife's laptop, and there is this god-awful squeal. I know it's been around since prior to the HDD exchange, so it can't be that.

Any idea what could be causing this horrible, horrible noise?
post #2 of 5
Power Supply units can squeal, and I've heard that the inverter for LCD screens can squeal on very rare occasions. I've heard computers make all kinds of noises, but that's the only causes for high pitched squealing I can think of (for a laptop. For a desktop, some video cards can be "noisy" like this).

As a way of double checking this, remove all moving parts from the laptop (HDD, CD/DVD drive, AND the cooling fan) and fire it up. It should still squeal. If not, try replacing your cooling fan. If it does still squeal, then while it's apart, put your ear near the bottom of the LCD screen. Does it sound like it's coming from there, or does it sound like it's coming more from the corners of the laptop?
Big Baby
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Big Baby
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Core 2 Duo E8400 Wolfdale 3.0 Ghz Asrock P45R2000 WiFi 460 GTX 6GB Patriot Viper DDR3 1333 (2x1GB and 2x2GB) 
Hard DriveOptical DriveOSMonitor
Kingston 64GB SSD, 1TB Hitachi and 3 160GB drives ASUS dual layer SATA II DVD burner Windows 7 Pro 64 Bit and a few virtual machines ;) Hanns.G Hi221D 22" LCD Widescreen 
KeyboardPowerCaseMouse
standard junker nothin' fancy. Yet... HIPER 730 W Rosewill Conqueror Logitech Trackball (TrackMan is the model I think) 
Mouse Pad
The Desk! 
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post #3 of 5
Running both my desktop and my laptop in the same room, I was hearing a god-awful squealing noise and sure enough it was my power supply on my laptop. For whatever reason, my headphones were picking up the noise, I can't explain or understand it, but unplugging the charger from the laptop stops the squealing, which led me to the conclusion that thats what was the root of the problem, in my case.
"The SR-2 Grid"
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"The SR-2 Grid"
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Hard DriveHard DriveHard DriveOptical Drive
300 GB WD Velociraptor WD Caviar Blue 640 GB WD Caviar Green 500 GB LG Blu Ray Combo Drive 
CoolingOSMonitorKeyboard
Corsair H50 x2 Windows 7 Professional / Snow Leopard/ubuntu/Win 7 LG 55 inch tv, I-Inc 28 inch, Acer 20 Inch, 11.... Corsair K90, Logitech g13 
PowerCaseMouseMouse Pad
Antec CP-1000 Coolermaster Cosmos II Razer DeathAdder Drumpad 
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post #4 of 5
My laptop squeals when the CPU is under load.

Most laptops do it.

Not really a squeal but some extremely high-pitched whining that sounds like random scratching of a disk head.
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T8
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T5
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Intel Core™ i5 2400 @ 3.0 ASROCK Z68 Pro 3 M AMD Radeon HD 6950 Shader Unlocked, @ 900/1400 2x KVR1333D3N9/4G 
RAMHard DriveHard DriveHard Drive
2x KVR1333D3N9/2G Plextor M5S 128GB Western Digital Caviar GreenPower WD5000AACS Western Digital Caviar WD2500JS 
Optical DriveCoolingOSMonitor
LiteON iHAS324 DVD-RW DL Thermaltake Water 2.0 Pro w/ AVC DS12025B12U Windows 7 Home Premium x64 Dell Ultrasharp U2211H 
KeyboardPowerCaseMouse
Rapoo V500 (Kailh Yellow) FSP Aurum AU-400 400W 80PLUS Gold CoolerMaster Silencio 352 CoolerMaster Storm SPAWN 
Audio
Fenda F&D H200 2.0 USB Powered 
CPUMotherboardGraphicsRAM
Intel Core i3 2100 @ 3.0 ASROCK Z68 Pro 3 M AMD Radeon HD 5770 1GD5 (Reference) 2x KVR1333D3N9/4G 
RAMHard DriveHard DriveOptical Drive
2x KVR1333D3N9/2G Transcend SSD370 128GB WD Scorpio Blue WD7500BPVT Samsung SH-223C 
CoolingCoolingOSMonitor
Thermaltake Water 3.0 Performer-C AKASA Ball Bearing Windows 7 Home Premium x64 Dell Ultrasharp U2311H 
KeyboardPowerCaseMouse
Armaggeddon Strike Eagle MKI-3 (Kailh Red) Dell (Foxconn) F320EM-00 320W 80PLUS Gold CoolerMaster Elite 341 CM Storm SPAWN 
Audio
Dell USB Powered 2.0 
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post #5 of 5
Same thing happens to my laptop when its CPU/GPU is under load (especially GPU) . And when I plug my earphones in it, I still hear the whining
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