My son had this computer {e machine} for about a year and has GIVEN (minus the ram which i have replaced) it to me because of the issue it's having. When you turn it on it powers up then it beeps a couple of times, doesn't boot up, then shuts off. HELP please. I have copied the specs of the pc below.
Kisses,
Tamara

Specifications
CPU : Intel® Pentium® 4 Processor 631
Hyper-Threading and Intel® EM64T Technology
(3.00GHz, 2MB L2 cache, 800MHz FSB)
Operating System : Genuine Windows Vista® Home Basic

Monitor : Includes eMachines® 17" Widescreen LCD
Chipset : Intel® 945G
Memory : 512MB DDR2 dual-channel capable (1 × 512MB), 533MHz (PC4200)
Expandable to 2GB Just installed 2 1 gb ram cards
2 DDR2 Slots (Total), 1 DDR2 Slot (Available)
Hard Drive : 160GB SATA II (7200rpm, 8MB cache)
Optical Drive : DVD±RW 16x Multiformat Dual-Layer Optical Drive
Up to 8.5GB with Dual-Layer Media
Write max: 16x DVD±R, 6x DVD-RW, 8x DVD+RW, 4x DVD+R DL, 40x CD-R, 24x CD-RW
Read max: 16x DVD-ROM, 40x CD-ROM
Media Reader : High-Performance 15-in-1 Digital Media Manager™
xD-Picture Card™, CompactFlash® I (CF), CompactFlash® II, Secure Digital™ (SD), Mini Secure Digital™ (Mini SD), Multi Media Card (MMC), Reduced Size MMC (RS-MMC), MMC Mobile, MMC Plus, Memory Stick (MS), Memory Stick Duo, Memory Stick Pro®, Memory Stick Pro® Duo, SmartMedia, IBM Microdrive
Video : Intel® Graphics Media Accelerator 950
Up to 224MB Shared Video Memory
PCI-Express® (PCI-E x16) slot available for upgrade
Sound : 6-channel (5.1) high-definition audio
Amplified Stereo Speakers (USB-Powered)
Communications : 56K ITU v.92-ready Fax/Modem (RJ-11 port)
Intel® 10/100Mbps Ethernet LAN (RJ-45 port)
Peripherals : Premium multifunction keyboard, 2-button wheel mouse
PORTS/Other : 6 - USB 2.0 Ports (2 Front, 4 Rear)
1 - VGA
1 - Parallel port
1 - SERIAL port
2 - PS/2 ports (keyboard and mouse)
3 - audio (rear): line-in/side (stereo), front/headphone (stereo), microphone
2 - audio (front): microphone, front/headphone (stereo)
1 - RJ-45 ethernet port
1 - RJ-11 modem port
Sounds like replacing RAM caused this. You might have bad RAM chip, or have installed it improperly. Try re-seating it. Also check this link to learn more about beeps.I found 1 link for a 945 that says 3 long beeps = memory problem and 4 beeps (alternating frequency) = thermal problem. Is it "a couple of beeps" or 3 beeps?Travel to Crucial.com and ENTER the system info to see what type of RAM you should have...
All RAM is not created equal.