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E_machine No post

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September 5, 2010 3:40:15 AM

CPU : AMD Athlon™ 64 Processor 3800+
64-bit processor with AMD64 technology
(2.4GHz, 512KB L2 cache, 2000MHz system bus)
Operating System : Genuine Windows Vista® Home Premium
Display : eMachines® 17" Widescreen LCD Display (E17T6W)
1440×900 (native and maximum)
Chipset : NVIDIA® GeForce® 6100
Memory : 1024MB 667MHz DDR2 dual-channel memory (2 × 512MB)
Expandable to 2GB
2 DDR2 slots (total), 0 DDR2 slots (available)
Hard Drive : 250GB SATA II (7200rpm, 8MB cache)1
Optical Drive : 16x DVD±R/RW Supermulti drive
Up to 8.5GB with dual-layer media
Write max: 16x DVD±R, 8x DVD±R DL, 8x DVD±RW, 12x DVD-RAM, 48x CD-R, 40x CD-RW
Read max: 16x DVD-ROM, 48x CD-ROM, 8x DVD-ROM DL
Video : NVIDIA® GeForce® 6100 integrated graphics
Up to 128MB shared video memory
PCI Express (PCIe x8) slot available for upgrade
Sound : 6-channel (5.1) high-definition audio
Communications : 56K ITU v.92-ready fax/modem (RJ-11 port)
10/100Mbps Ethernet LAN (RJ-45 port)
Peripherals : Standard multifunction keyboard
2-button wheel mouse (PS/2)
Amplified stereo speakers (USB powered)
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
Dimensions : 14.5"H x 7.2"W x 16.1"D2
Weight : 21.5 lbs.3 (system unit only)
Warranty : 1-year parts and labor limited warranty4
Software :
Genuine Windows Vista® Home Premium
Productivity Software
Microsoft Works® 9.0

Machine turns on but no video or post audible.

More about : machine post

a c 144 ) Power supply
September 5, 2010 8:26:09 AM

Work through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-postin...
I mean work through, not just read over it.

Breadboard - that will help isolate any kind of case problem you might have.
http://www.tomshardware.com/forum/262730-31-breadboardi...

Breadboard with just motherboard, CPU & HSF, case speaker, and PSU. You do have a case speaker installed, right? If not, you really, really need one. If your case or motherboard didn't come with a system speaker, you can buy one here:
http://www.cwc-group.com/casp.html

You can turn on the PC by momentarily shorting the two pins that the case power switch goes to.

You should hear a series of long, single beeps indicating memory problems.
Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU. Remember, at this time, you do not have a graphics card installed so the load on your PSU will be reduced.

If no beeps:
At this point, you can sort of check the PSU. Try to borrow a known good PSU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.

The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.

You can turn on the PSU by completely disconnecting the PSU and using a paperclip or jumper wire to short the green wire to one of the neighboring black wires.
http://www.youtube.com/watch?v=5FWXgQSokF4&feature=yout...

This checks the PSU under no load conditions, so it is not completely reliable. But if it can not pass this, it is dead. Then repeat the checks with the PSU plugged into the computer to put a load on the PSU.

If the system beeps:
If it looks like the PSU is good, install a memory stick. Boot. Beep pattern should change to one long and several short beeps indicating a missing graphics card. Silence or long single beeps indicate a problem with the memory.

Insert the video card and connect any necessary PCIe power connectors. Boot. At this point, the system should POST successfully (a single short beep). Notice that you do not need keyboard, mouse, monitor, or drives to successfully POST.

Now start connecting the rest of the devices starting with the monitor, then keyboard and mouse, then the rest of the devices, testing after each step. It's possible that you can pass the POST with a defective video card. The POST routines can only check the video interface. It cannot check the internal parts of the video card.
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a b ) Power supply
September 5, 2010 2:49:30 PM

Swap the PSU with a known good one.
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a b ) Power supply
September 5, 2010 3:32:15 PM

is the psu a bestec atx-XXX-12e? (replace XXX with the wattage). they are known to fry motherboards by surging on the 5vsb rail. try a different psu, if not then its probably your mobo. check for bad (bulgy or leaking brown stuff) capacitors
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