You need to check your manual in the troubleshooting tools section.
On my Dell XPS 410 lights 3 and 4 signify:
Memory modules are detected, but a memory failure has occurred.
Michael
"jadedgamer" <(E-Mail Removed)> wrote in
message news:(E-Mail Removed)...
>
> I am suffering from the exact same problem. Though I don't have an
> answer, I would love to hear the solution to this problem. Oddly enough
> I too was using a bluetooth keyboard when this happened, a Logitech
> diNovo Edge to be exact. Only the computer went to sleep after I
> accidently hit the power button on it (It's the Mac Edition keyboard).
> And as you said after trying to power on the tower the light does not
> immediatly go green. After 30 seconds it lights solid and the 3 and 4
> stay lit. No display, and noy input devices are powered.
> Baffled Del Owner;615310 Wrote:
>> I have a Dell Dimension E521, running Vista with a bt keyboard and
>> mouse. My
>> monitor went into sleep mode while running a spybot scan and now I
>> cannot get
>> it to wake up. There is no response when I move the mouse or hit
>> keyboard
>> keys. The batteries in the keyboard and mouse are good, just replace
>> mouses'
>> and I had just been on the computer for 2 hours before this happened,
>> everything was working fine. The only clue I can give is that when I
>> started
>> this two hour session windows popped up and asked permission for
>> startup
>> programs to have access. I said yes, and went on to work for two
>> hours. I I
>> have had an XP machine for years. This Vista was only purchased in
>> October.
>> The two machines are networked. When I turn on the Vista machine, it
>> is
>> louder than usual, and two lights flash on the front, 3 and 4. Any
>> assistance would be appreciated.
>
>
> --
> jadedgamer
> Posted via http://www.vistaheads.com
>