Unable to work with Ubuntu 7.10

[Captain]

I use Windows XP Professional edition and also Ubuntu 7.10 linux installed from the CD which I got through Post from Netherlands.
My problem is, when Ubuntu loads the monitor (lenovo L151) displays a message "bios bug #81 found", "can't load bridge 7 of...." and "Input Signal out of range". Also if I run Ubuntu CD as a live CD sound gets muted and when I boot into Windows XP the sound has to be enabled each time. These problems repeat every time. My friend uses same Operating Systems with an ordinary assembled PC but faces no problem at all.
Another point to be noted is that no such problems are faced by me with Windows XP and it works perfectly.

Can anybody help me?

My computer(Lenovo ThinkCentre A55)'s technical specifications,
Based on 8985-32C: Pentium Dual-Core Processor E2140, 1GB, 160GB 7200RPM SATA HDD, no diskette drive, PCI/PCIe Tower (3x4), Intel Graphics Media Accelerator 3000, 48x32x48x16x CD-RW/DVD, Broadcom Gigabit Ethernet.

[NucleusKore]

Just see this
https://bugs.launchpad.net/ubuntu/+s...org/+bug/54294

Your problem is listed here, don't think there is a solution. You should ask Praka123 and other users here. Maybe they can throw some light on this.