Screen issue

[jack001214]

Hi,im having a issue.I have a fully working 10.10 and i want to upgrade to 10.11 but the issue is that when i boot into the installer,the second screen is on with a gray background and the first display is on but black only the back light is on.

 

laptop specs:

WIRELESS CONNECTIONS

Wireless technology supported

Wireless 802.11b, Wireless 802.11n, Bluetooth, Wireless 802.11g

GENERAL

Weight without PSU

2.6kg

Other Features

Intel Core i5-430M CPU, ATI Mobility Radeon HD 5650 graphics adapter, 640GB hard drive, Windows 7 Home Premium 64-bit

POWER OPTIONS

Power Supply

Battery, AC Power

Battery Type

Rechargeable - (Li-Ion)

WIRED CONNECTIONS

Wired Terminals / Ports

External SATA, USB 2.0, HDMI Output, Microphone Jack , D-Sub, RJ45, Headphone Jack

Number of USB 2.0 Ports

3

Network Protocols Supported

Wireless, Ethernet

DISPLAY

Screen size

15.6 in

Display Technology

TFT with LED backlight

Screen Resolution

1366x768

MEMORY

RAM Type

DDR3

Installed memory (RAM)

6 GB

INPUT DEVICES

Input Devices

Buttons, Touchpad, Keyboard

MULTIMEDIA FEATURES

Inbuilt Camera

Yes

Built-in Microphone ( Mobile )

Yes

PROCESSOR

Processor Speed

2.26

PCS

Physical Security Features

Slot For Cable Lock

MEDIA

Supported Memory Media

Secure Digital (SD)

HARD DRIVE

RPM

5400