hi, i have a sony vaio PCV-RX860, and i want to install a new motherboard, but i dont see how to take off the case to install it! ive tried EVERYTHING, i can take off the one side to change graphics cards, memory ect. But i REALLY want a new motherboard, i even already bought it.. what do i do??? any help would be GREATLY appreciated.. heres the specs i got off of the sony site if it helps any:

VAIO® Computer Specifications

PCV-RX860

Hardware Specifications

The following table details the hardware specifications of your computer.

Model PCV-RX860
Processor 2.40B GHz1 Intel® Pentium® 4
Hard Disk Drive 80 GB2, ATA-100
C = 16 GB, D = 64 GB
Standard Memory (RAM) 512 MB PC2100 DDR-SDRAM, expandable to 1.5 GB
Graphics SiS 651 Integrated Graphics
Video Memory (VRAM) 32 MB (Shared with system memory)
MPEG “Sony Tuned” MPEG Digital Video supports full-screen video playback
Sound Capabilities YAMAHA YMF-753
FLOPPY Disk Drive 3.5" 1.44 MB
DVD-RW Drive 2X max. DVD-RW/DVD-R reading3
6X max. DVD-ROM reading
24X max. CD-R/CD-ROM reading
20X max. CD-RW reading
8X max. CD-R writing
4X max. CD-RW writing
2X max. DVD-R writing
1X max. DVD-RW writing
CD-ROM Drive 40X max. CD-R/CD-ROM reading4
24X max. CD-RW reading
Modem V.90 data/fax modem5 (REN 0.8B)
Expansion Capabilities Hard disk drive bay
PCI slots (2)
AGP slot
Connection Capabilities – Front Memory Stick® media slot
i.LINK (4-pin) port
USB 2.0 ports (2)
Connection Capabilities - Rear USB 2.0 ports (4)
PS/2® keyboard port
PS/2 mouse port
VGA monitor port
Parallel (printer) port
S/P DIF Optical out port
Headphones jack
Line In jack
Microphone jack
i.LINK (6-pin) port
Modem line jack
Telephone jack
DC Out jack
10BASE-T/100BASE-TX Ethernet-LAN port (RJ-45)
Supplied Accessories VAIO® Smart keyboard
PS/2® wheel mouse
Stereo speakers with AC adapter (PCVA-SP3)
Power cord
Modem cable
Service 90-day limited service. See Limited Warranty Card.6
Limited Warranty 90-day parts/labor standard. See Limited Warranty Card.6
Power Requirement 300 watts maximum
Voltage 100 - 120 V ~2.0A
Dimensions 8.0" (w) x 14.2" (h) x 14.6" (d)
(203 mm x 360 mm x 371 mm)
Weight 28.7 lbs. (13 kg)
Operating Temperature 50°F to 95°F (+10°C to 35°C)Take your time, take care and have a look around to familiarise yourself with the layout inside.

This is the company I work for. Some interesting info if you ever need any on different models, brands etc.

http://www.pcservicecall.co.uk/layout.aspx?ID={1a7f7c02-3842-483d-b59e-237280eeacf9}&CatID={55c22eb8-a94f-4d08-b623-ea0eed4b56a8}Is that a standard ATX or a proprietary motherboard? I would definitely answer this question BEFORE I started dis-assembling the box.