[TechCliff]

Let start you guys have really helped in the past and I really apprecate it.
I'm working on a emachine for a friend and here is what he has.
The model is T2896 Pent 4 478B board 512mb ram The board is a D865GVHZ, power supply is a 450 watt
It won't start up, I tested the power supply and it was good. But just to be sure I put new one in. Replaced motherboard with a new one. Still no power to motherboard.
I took off front cover and removed switch but seems to work alright. Still with everything hooked up it will not boot up. By the way power is getting to motherboard green light did come on. I really don't know what to do next. Cann't understand way no power is getting to switch. I really could use some help on this one.

[DB6150]

Does it post or beep or make any noises at all?

[TechCliff]

No it plain does not even turn on. I just a few mins ago switched cases to see if that was the problem, but nothing. I cann't even get the fan to turn on.

[RogueSpear00]

Try taking everything listed out of the case and power it on -

Motherboard, Power Supply, CPU/Fan, Memory, Video Card (If not on-board).

Put those components on something non-conductive like a cardboard box and attempt to power it on. These are the basic components to have a computer work.

If these things work and the computer turns on (make sure to plug in the monitor), then something that isn't listed is causing a problem.

[TechCliff]

Ok I took everything out of the case took memory out of slot tried cpu out of socket tried in socket. The power light does come on the board but will not turn on or boot. I put everything on cardboard and tried it. still nothing. I put motherboard on card board cpu/heatsink/fan, memory and power supply. I even tried taking switch that turns computer on and hooking it up also, nothing!!!. Like everything on old & new motherboard is dead. But power supply does work when you hook up a tester to it. It does turn on.

[DB6150]

Try running it without a CPU and RAM and see if it gives you a warning beep.

[dustyjay]

With out a CPU and Ram the motherboard will not respond at all. It is possible that the CPU is bad though. We are talking eMachines here, I am guessing that the original power supply was something along the lines of a Bestec. And the Motherboard something like an ECS, or PcChips.

[DB6150]

Without a cpu and ram, the motherboard will turn on and just sound the system buzzer constantly, But it will turn on.

[Rich-M]

Yeah when an eMachine blows a psu, it usually kills the board and cpu also as Dustyjay says.

[TechCliff]

Ok I tried it without cpu and ram. No Power. I tried each on by their selfs. No power. I am at a lost. I've even tried another cpu and no power.

[DB6150]

Going to agree with Rich-M on this one... Sounds like multiple parts are bad.