I have managed to install Leopard-10.5.2-AMD-EFI-Rev2 on my 5103 and it installs perfectly, but when it re-boots after installation, all i get is a flashing cursor in the top left of screen. Can anyone help please.

Main Specifications
Product Name: Aspire 5103WLMi Notebook
Processor & Chipset
Processor: AMD Turion 64 X2 TL-52 1.6GHz Processor Technology:
HyperTransport Technology
PowerNow Technology
Bus Speed: 1600MHz
Cache:
1MB L2
256KB L1
Memory
Standard Memory: 1GB
Maximum Memory: 4GB
Memory Technology: DDR2 SDRAM
Memory Slots: 200-pin SoDIMM (2 Total/0 Free)
Memory Cards Support Secure Digital (SD) Card
MultiMedia Card (MMC)
Memory Stick
Memory Stick PRO
xD-Picture Card
Storage
Hard Drive: 120GB Ultra ATA/100 (ATA-6) 5400 rpm
Optical Drive: DVD-Writer - DVD-RAM/±R/±RW
Display & Graphics
Display Screen: 15.4" WXGA Widescreen Active Matrix TFT Colour LCD with CrystalBrite
Graphics Controller: ATi Mobility Radeon X1300 128MB PCI Express
Display Resolution: 1280 x 800 (Internal)
Colour Support: 16.7 Million Colours 24-bit
Network & Communication
Network:
54Mbps Wi-Fi IEEE 802.11b/g Integrated
10/100Mbps Fast Ethernet IEEE 802.3u
Modem: 56Kbps V.92 Data/Fax Modem
I/O Expansions
Expansion Slots: 1 x PC Card Type II
Input Devices
Keyboard: Standard Size
Pointing Device: TouchPad
Interfaces/Ports
Ports 1 x DC Power Input
3 x 4-pin Type A USB 2.0 - USB
1 x VGA
1 x RJ-11 Modem
1 x RJ-45 Network
1 x Mini-phone Audio Out
1 x Mini-phone Microphone/Audio In
Software
Operating System: Windows XP Media Center Edition 2005
Software Included:
Acer GridVista
Acer Launch Manager
Acer Arcade
Norton AntiVirus
Adobe Reader
NTI CD Maker
CyberLink PowerProducer
Battery Information
Batteries: 1 x 6-cell Lithium Ion (Li-Ion) 44.4 Wh Standard Battery
Battery Life: 2.5 Hour(s)
Miscellaneous
Package Contents:
Aspire 5103WLMi Notebook
Lithium-Ion Battery
AC Adapter
Additional Information
Built-In Devices:
Microphone
Acer OrbiCam 0.3 megapixel CMOS Camera
Security Features:
Kensington Lock Slot
User BIOS Password
Supervisor BIOS Password