Rattling noise from CD Rom area

I have an iMac Desktop (21.5-inch, Mid 2011), a year ago it started making an intermittent rattling noise, it appears it comes from the cd-rom area, now is turn into a continuous noise, theres no CD Rom inserted,any ideas?, thanks in advance

My question is why are you leaving it on Standby/Hybernate for extended time periods instead of shutting it down?
If you don't post your COMPLETE model number it's very difficult to assist you. Please try to post in complete sentences with punctuation, capitals, and correct spelling. Toshiba does NOT provide any direct support in these forums. All support is User to User in their spare time.

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Original description: T7300(2GHz), 1GB RAM, 160GB 5400rpm HD, 15.4in 1680x1050 LCD, 128MB nVIDIA Quadro NVS 140M, CDRW/DVDRW, Intel 802.11agn, Bluetooth, Modem, 1Gb Ethernet, UltraNav, Secure chip, Fingerprint reader, Intel Turbo Memory, 6c Li-Ion, WinVista Business
Message Edited by dream on 08-09-2008 09:35 AM
Message Edited by dream on 08-09-2008 09:38 AM

Dirt can get under the button in an instant.
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>>How to contact MSI.<<

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Hi, everyone.
I bought a new mackbook pro in this Jan. Recently, I hear some not continuously noise from hard disk, especially when i open a file in hard disk or verify the hard disk. Is something wrong with my hard disk?
Thanks

This hard disk clicking is a know problem for many laptops. If you search it on Google, you will find a lot of discussions about it in the Unbuntu Linux forums. In most cases, it is due to the Advanced Power Management (APM) feature of notebook hard drives. The default APM settings of these drives are aggressive so as to extend notebook battery life. As a consequence, the HD tries to park its actuator head to the ramp whenever it judges the system as idle. However, OS X or some third-party applications may access the hard disk quite often, resulting in a park/unpark cycle every few seconds.
Every of these cycles is counted as one load/unload cycle. Most notebook drives support up to 600,000 load/unload cycles. If a hard drive parks its head every few seconds, it may shorten its life by "using up" the cycles more quickly.
I had the same problem on my Powerbook with a Hitachi Travelstar 5K160 80GB PATA drive. I heard the frequent clicking sound right after I installed it into the laptop. The SMART status appeared to be Verified, and there was no problem with the drive itself. After searching on Google and Hitachi web site, I found the causes and solved the problem using the Hitachi Feature Tool. For other HD brands, I have no experience at all.
Basically, Travelstar 5K160 drives have three idle modes, from which a user can set one as the deepest idle state:
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2) Low Power Idle: this is usually the factory default idle mode. The head is UNLOADED to the ramp and the power consumption is 60-65% less than the performance level. Recovery time is about 300ms.
3) Low RPM idle: in this idle mode, the hard disk will spin down to a lower RPM speed. More power is saved but recovery time is much longer. (I can hear the disk spin down and spin up again a few times per minute. There is also a lag in system reaction time.)
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You can download Hitachi Feature Tool 2.10 as an ISO image here: http://www.hitachigst.com/hdd/support/download.htm#FeatureTool and burn it into a bootable CD. The userguide of the tool is available on the same page.
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Hope this is helpful.

Rattling noise from CD Rom area

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