Re: I thought that Dell power supplies were different?
- From: "news.rcn.com" <news.rnc.com>
- Date: Thu, 28 Feb 2008 22:36:32 -0500
"Ben Myers" <ben_myers_spam_me_not@xxxxxxxxxxx> wrote in message
news:7fubs3pprpb4n51g0748hafmdceeioghbp@xxxxxxxxxx
First, the cases and motherboards are physically compatible between the
4400 and
the 4550. At the risk of messing up a working 4400, you could swap the
4550
motherboard into the 4400 case. That's too risky. Best thing to do is
to
disconnect every device and board from the 4550, except for any video
card. Then
see if it powers up. If not, get yourself a working Pentium 4 ATX12v
power
supply and test the motherboard with it, rather than the power supply in
the
4550. Before doing so, make sure that the memory is in its DIMM sockets
and
remove the heat sink to make sure that a processor is in the Socket 478.
Sometimes people remove the processors, and that does cause a problem. If
the
board does not power up with a CPU, memory, working power supply, and
video
card, then you can assume that the board is dead... Ben Myers
Hi Ben
I am grateful to you for your well thought out response but I don't
necessarily understand two things: ( I CAN see that there is a possibility
that the PS may be sending enough voltage to the moboto light up the green
led but not enough to power it on)
Firstly I appreciate your not wanting me
to waste time ruining a working 4400 but I don't THINK I have access to a
Dell power supply. Does Dell still use different power supplies form other
computers or will any ATX with a standard connector and that square 4 pin
24 volt supply do? I have a Bestec ATX-1956D,- but isn't it easier (if
they are different) to put a 4400 one in the 4500?
Secondly why do you discount so completely the possibility that either the
switch itself or the board near the USB connector at the front may have
died?
On Wed, 27 Feb 2008 12:00:17 -0500, "news.rcn.com" <news.rnc.com> wrote:
Just inherited a Dimension 4550 not working: I plugged it in and the green
light on the MoBo went on. However the cords from the Mobo to the power
switch board (not obviously to the power switch itself) near the USB ports
and the cords from the power switch to that board were unplugged.
When I plugged them both in, the power switch doesn't work at all. No
click, no electronic noise and nothing happens.
Is this model known to have a problem with either of these components?
I also have two working 4400s. Is there an easy solution to getting the
4550
(which seems to have a vastly superior spec) working? Is my only
realistic
option to assume that the 4550 mobo is working and that I should just do
all
the work necessary to swap motherboards on the 4400? The interior layout
of
all units looks very similar with similar heat sinking/cooling of the
processor, the same memory and connectors to the MoBo and the same power
supply.
Or does anyone have experience of it being easier to cannibalise the 4400
for either the power switch or the circuit board near the USB sockets?
.
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