Member Avatar for strictlycustom

I just bought a Jetway n2view, mainly because it supports up to 3ga of ram and has nvidia chipsets. Previously I purchased a mobo from and it did the same thing so I sent it back and it was found defective. So I buy a new board. Here is what it is doing

I power it on, lights light up, fans spin for 2 seconds then shut off. I remove ram, harddrive's ide cable, unscrew motherboard and put it on a cardboard box, same thing.

I remove processor, Athlon XP 2400, and it powers up and runs just fine until I turn it off.

Bad mobo? or bad processor? Power supply is brand new, came with my NZXT Nemesis Elite case.

Let me know what you think. Although I had one guy tell me Jetway is garbage :(

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Dani AI

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As described, the board powers for a couple of seconds then dies, and it stays up when the CPU is removed. Because you already saw the same symptom with a previous board, this strongly points away from a random case short and toward either the CPU or the power delivery to the CPU (PSU or the CPU 2x2/4-pin ATX12V feed), or a CPU/socket electrical fault. is right to push a component-by-component bench test; below is a compact, ordered checklist to isolate the fault and avoid needless parts swaps.

  • Confirm the CPU 4-pin (2x2) ATX12V connector is present and plugged into the motherboard. Fans can spin from the main 20/24-pin feed, but the CPU needs that separate 12V feed. If the PSU lacks the correct plug, do not run the system long; either get a PSU with the proper connector or borrow one for testing.
  • Do a minimal bench test (on cardboard): only main ATX 20/24, ATX12V 4-pin, CPU with heatsink and its fan connected to the CPU_FAN header, one stick of RAM in the primary slot, and nothing else. Short the front-panel power pins to start. Observe whether it still dies.
  • If it still shuts off, swap in a known-good PSU (borrow if possible). Cheap new case PSUs can fail under CPU load and trip instantly.
  • Inspect the CPU and socket carefully for bent pins or foreign debris (use a magnifier, handle the CPU by the edges, ground yourself). Bent or shorted pins will often cause immediate shutdown.
  • Test or swap the CPU or motherboard if you can (try the CPU in another compatible board or vice versa). If that is not possible, a quick bench test by a shop that only diagnoses the CPU/PSU (ask for a written result) is worth the cost.

Also try the single-stick RAM test that suggested, and attach a small internal speaker or watch any POST LEDs for codes. If all of the above fails and the CPU proves faulty, RMA or replacement is the next step.

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Member Avatar for strictlycustom

I have also read that people are forgetting to hook up the 2x2 power connector, and mine only has the one. I have not hooked up the H.D.D LED because I don't see a spot on my mobo for that. But then again it runs fine w/o the the processor so I don't think that is the problem.

Member Avatar for coolraj003

Have you tried to power up the machine by removing one component at a time?
Time consuming, it is but you would have far more chances to pin point the actual problem that way. It could be another bad Mobo for u or could be the PSU as well, U can never tell like that unless u round up all the corners to see what s left?

Hope this ll help u.

Raj

Member Avatar for strictlycustom

Today I'm going to try just leaving the power button connector on, CPU, and the system fan in and try to boot it up. Because it starts fine when I take out the CPU and will run till I turn it off. Local shop wants $60 to test and install it, and if it's bad then it's still $60, F that!

Member Avatar for coolraj003

Try that and see if you can rule out all the working components and get to the one or two faulty ones. Once u get there try them on a different machine and see ahich one functions.

Member Avatar for BstrucT

I agree with coolRaj, works for me.

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