Base
| Processor Support | AMD™ V Series Processor V120 (512KB L2 cache, 2.2GHz) |
| Chipset | AMD™ M880G |
| RAM Size | Up to 8GB |
| RAM Type | 1066Mhz DDR3 |
| RAM Slots | 2 |
Acer Aspire 5251 Specifications
Storage
| HDD Size | up to 500GB – 5400RPM |
| HDD Type | SATA |
| HDD Bays | 1 |
| HDD Size | 2.5” |
| Optical Drive | DVD+-RW |
Input
| Keyboard | 103-key keyboard, inverted T cursor layout, independent standard numeric keypad, hotkey controls, international language support |
| TouchPad | Yes |
| Track Point | No |
Graphics
| Screen | 15.6” (1366×768) Widescreen |
| Graphics Controller | ATI Radeon™ HD 4250 |
| Graphics Memory Type | Shared |
| VGA Out Port | Yes |
| DVI Out Port | No |
| HDMI Out Port | Yes |
| DisplayPort | No |
| TV Out Port | No |
| Tablet | No |
Sound
| Sound Controller | High Definition Audio |
| Speakers | 2 |
| Microphone | Yes |
| Headphone Port | Yes |
| Microphone Port | Yes |
| Line In Port | No |
| S/PDIF In Port | No |
| S/PDIF Out Port | No |
Network
| Ethernet Port | 10/100/1000 Ethernet |
| Wireless | Acer InviLink Nplify 802.11b/g/n |
| Bluetooth | No |
| WWAN | No |
| Ultra WideBand | No |
| Modem | No |
Ports
| USB Ports | 3 x USB2.0 |
| Firewire Ports | No |
| ExpressCard Slot | No |
| PC Card Slot | No |
| E-SATA Port | No |
| Serial Port | No |
| Parallel Port | No |
| Docking Station Port | No |
| IR | No |
Physical Details
| Dimensions (W x D x H) | 38.1cm x 25.3cm x 3.40cm |
| Weight | 2.6kg |
Power
| AC Power | 65-watt AC adapter |
| Battery | Six-cell lithium ion battery: up to 3.33 hours life |
Other Hardware
| Card Reader | Yes, 5-in-1- MultiMediaCard™, Secure Digital card, Memory Stick®, Memory Stick PRO™ or xD-Picture Card™ |
| Webcam | Yes |
| TV Tuner | No |
| Fingerprint Reader | No |
| SmartCard | No |
| GPS | No |
Other Details
| Lock Slot | Yes |
| Supported OS | Microsoft Windows 7 |
The up, down, left, right arrows in keyboard. The up down arrows also have a speaker on them Pressing them doesnothing to volume. The left right arrow keys have ontrast symbols on them. Pressing them does nohing. ?????????????????
I think you are not pressing the “fn” key 2nd button from left bottom side. You should keep fn key pressed and then press the up down keys…
And if fn is still not works then you may need to install utility software available for Acer Aspire 5251
visit http://www.acer.com