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Question posted by torla55 on April 7th, 2012

Aspire 7740g Starts To Howl Every Time I Start It Up.

After a short starting up period it starts to howl for about 20-30 secs. Its a highfrequent not-very-pleasant noise. Then suddenly it stops and everything seem to function OK - so far! The machine is 3 years old.

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Answer #1: Posted by BusterDoogen on April 14th, 2012 5:40 PM

BusterDoogen

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Faulty exhaust fan or HDD. Good luck!

Related Acer Aspire 7740G Manual Pages

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 1

Aspire 7740 and 7740G Series Service Guide Service guide files and updates are available on the ACER/CSD web; for more information, please refer to http://csd.acer.com.tw PRINTED IN TAIWAN

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 2

Revision History Please refer to the table below for the updates made on Aspire 7740 and 7740G Series service guide. Date Chapter Updates II

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 8

... 107 Clearing Password Check 107 BIOS Recovery by Crisis Disk 108 FRU (Field Replaceable Unit) List 113 Exploded Diagram 114 Model Definition and Configuration 125 Aspire 7740/7740G Series 126 Test Compatible Components 147 Hardware Device Tests 148 Online Support Information 151 Index 153 VIII

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 14

... Sleep mode. Press any key to save power. Turns the speakers on and off to return. Hotkey + Icon Function System property Description Starts System Property for displaying system information. + Bluetooth Enables/disables the Bluetooth function. (only for sound recording. 12 P Programmable key 13 Speakers User-programmable. Charging: The light shows amber when the...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 19

It can also be used with other keys to provide a variety of functions: < >: Open or close the Start menu < > + : Display the desktop < > + : Open Windows Explore < > + : Search for a file or folder < > + : Cycle through Sidebar gadgets < > + : Lock your computer (if you are connected to a network ...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 20

...function varies according to fit the situation as you change locations, networks or activities. Windows Mobility Center The Windows Mobility Center collects key mobile-related system settings in the Start ...find place, so you can quickly configure your Acer system to the language settings. q Start Windows Mobility Center from the Control panel. q Launch Windows Mobility Center by right-clicking...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 21

...and then click the check box Extend my windows desktop onto this monitor Apply OK Acer GridVista (dual-display compatible) NOTE: This feature is simple to set up...Acer Gridvista is dual-display compatible, allowing two displays to be partitioned independently. Start Control Panel Display UsinSgetttihnges SysteExmtenUd mtiyliwtiiendsows (2) desktop onto this monitor. To enable ...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 23

...=93  C OS shut down at 105  C; Hardware Specifications and Configurations Processor Item CPU type Core logic CPU package Specification Aspire 7740: Intel® Core i5 540M 2.53G 3M Aspire 7740G: Intel® Core i3 330M PGA 2.13G 3M Intel® Core i7 620M 2.66G 4M Intel® Core i7 720QM 1.6G...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 96

...CD-ROM module. 3. Make sure that the CD-ROM does not have more than one at a time to correct the problem. If the error still remains: 1. Reconnect the external diskette drive/CD-ROM module. ...to a controller, driver, or diskette. Boot from the diagnostics diskette and start the diagnostics program. 2. Replace the keyboard. 3. The following to select the test device. 1. Boot ...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 97

...Memory errors might stop system operations, show...the power adapter. 2. Chapter 4 91 Boot from the diagnostics diskette and start the diagnostic program (please refer to +20.5V Pin 2: 0V, Ground 1. Follow the instructions in the following ...see the appropriate power supply check in the message window. NOTE: An audible noise from the computer and measure the output voltage at the plug of the power...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 103

... system BIOS shadow RAM failure on data bits xxxx of high byte of memory bus Test CPU bus-clock frequency Initialize Phoenix Dispatch Manager Warm start shut down Shadow system BIOS ROM Autosize cache 97

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 104

... vectors POST device initialization Check ROM copyright notice Check video configuration against CMOS Initialize PCI bus and devices Initialize all video adapters in system QuietBoot start (optional) Shadow video BIOS ROM Display BIOS copyright notice Display CPU type and speed Initialize EISA board Test keyboard Set key click if enabled Test...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 113

... to bypass the password check, the user needs to short the hardware gap to enter BIOS Setup menu. Clearing Password Check Hardware Open Gap Description Hardware Gap Default Setting Open (Normal) HW Gap position on the main board: Gap name in Aspire 7740/7740G Series is one Hardware Open Gap on the main...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 114

...starts to restore the BIOS code from the Crisis Disk to create the Crisis Disk: 1. Creating the Crisis Disk in hand. Note that all data on the USB storage device will be connected. BIOS Recovery Hotkey The system provides a function... to a successful one once the previous BIOS flashing process failed. If this function, the AC adapter and the battery must be cleared during BIOS POST. The...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 115

When the pop-up warning dialog box appears, press OK to continue creating the Crisis Disk. Decompress the Crisis Package Source. 3. Select WINCRIS.EXE and then select Run as administrator under Vista. 4. Keep the default settings and then click on the Start button. 5. Chapter 5 109

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 119

... 6 This chapter gives you the FRU (Field Replaceable Unit) listing in the FRU list of Aspire 7740/7740G Series. Chapter 6 113 For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT... PARTS, you should check the most up-to repair or for repair and service of customer machines. NOTE: To scrap or to return the defective parts, you should follow the rules set by...

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 121

....ATR01.001 56.PAW01.001 1 USB BOARD 55.4GC02.001G Chapter 6 115 ACER_ASPIRE 7740 UMACBK_JV70_CP (NO: LX.PLY02.025/44 ) Category ADAPTER BATTERY BOARDS No. Aspire 7740/7740G Series FRU List 1.

Acer Aspire 7740, Aspire 7740G Notebook Series Service Guide - Page 132

Appendix A Aspire 7740/7740G Series NOTE: All models have following common specifications: LCD (NLED17.3WXGA+G), card reader (5-in-1), NB chipset (HM55), Webcam (0.3M DV) Model AS7740G338G50Mn AS7740G338G50Mn AS7740G338G50Mn AS7740G338G50Mn ...

Acer Aspire 7740, Aspire 7740G Notebook Series Start Guide - Page 3

...these steps to all models in the Aspire product series. Follow the instructions on how your notebook. The Quick Guide introduces you to the basic features and functions of your Acer notebook, we have ...User Guide mentioned below will run the Adobe Reader setup program first. poster helps you get started with language such as using the keyboard and audio, etc. 3 First things first We...

Acer Aspire 7740, Aspire 7740G Notebook Series Start Guide - Page 6

...monitor (if connected) and both. Turns the display screen backlight off . Enables/disables the Bluetooth function (only for displaying system information. Brightness up Increases the screen brightness. + < > + ... + + Function System Properties Bluetooth + Sleep Description Starts System Properties for certain models). Puts the computer in the hotkey combination.