4600C no power, flashing amber light

If your computer is running kind of sluggish, you can fix it with an easy clean up of your registry. Here's a link to a free scan that works well:
www.your-free-info.com/RegCure
I've used this one and it sped up my computer by quite a bit. Hopefully this helps.

FLASHING AMBER LIGHT FIX. This maybe in fact a motherboard issue, but actually its a bit more. You can and should replace the power supply with a more powerfull one as it will help overall, but the issue is Really the front USB ports and 2 issues concerning them, 1 some devices pluged into them have boot sequences of their own, (remember your boot seq goesfrom,USB,CD,ARRAY)etc.
So if the device isnt design with its own OS, the mis-boot will get stuck Hence the Flashing light. and 2. the front USB ports dont supply alot of power upon bootup. and the devices pluged into them will again cause a mis-boot. Simply unplug everything from the FRONT usb ports. You may have to shut the computer off and unplug the machine for about *15* minutes.
Enough to get the motherboard to downpower completely.
with the front usb ports clear, and the power cord unpluged, hold down the power button and plug in the machine. should boot no problem. So to sum things up. The motherboard is fine, it just not happy with so many usb ports (power wise). A larger power supply is a good idea but wont entirly fix the issue, Unplug front usb devices as they may have some form of bootup.

power supply in the computer?

I have used another power chord and with no success. Are you suggesting opening up the patient?

Rewire the room that you are operating in - easier. don't forget to get a building permit! My Gateway is running fine and with absolutely no issues after 12 years.

I am having similar issues. Ran fine last night - powered down. Today - nothing. No amber light, no sign of life at all. Held on button while plugging, kicking, screaming. Nothing. Now I am looking for my shotgun and ammunition!

Where does one aim at this point!!!??

It was not a bad power supply in my dimension 4600,as a new one resulted in the same blinking yellow light/ no power up.My solution to this problem is throw the piece of **** in the dumpster and buy an HP.

I replaced my power supply and it worked for a week. Then the cursor froze, the whole thing shut down and it only says" In Power Save Mode. Press any key on keyboard or move mouse." But nothing happens. I took it back to my local shop and they said it was the motherboard now. Which makes sense I guess, since I kept having to unplug it and replug it to get it to boot up. I also changed the settings to never, ever go to sleep again.

My 4600c had a solid amber light in the case, would seem to power on, then no POST or graphics. I fixed it by removing the fan/heatsink and examining the processor. It had a bent pin which was shorting on the next pin over. In straightening the pin it fell off. I reinstalled the processor anyways and it seems to be running fine.

Sounds like this is one of those known Microwave Issues. Be careful with that one. And yes, re-wiring the entire room is a definite solution to this issue. Start by replacing all the circuits at the breaker, then tear all the sheet rock off your walls. This may take a while, as you might guess. But the benefits are great after the re-modeling is all done and you bought a new couch.

Maybe you should consider buying a new Microwave.
Oh, and... maybe replace the power supply.
Here's the part Number for a Dimension 4600c PSU:
Manuf Part HP-L161NF3P 0P0813

Good luck with the Dry Wall!!!

The problem is with your microwave. The Dell PC on boot has detected the radiowaves. This has in turn when booting the Dell put it in to Ultra Safe Mode. This is new to this model Dell- the advantage is that you can still cook your ready made meal with out damaging the system board capacitors. Once the micro wave has finished you will be able to boot - dont forget it may be your neighbours micro wave!!

Fan stops, power supply goes into thermal shutdown. May work when cooled down.

I have been dealing with the same issue since last week. Dell Tech Support suggested that the power circuits on the motherboard had gone bad and that I replace the motherboard. I just did that this morning and the amber light is still flashing..the power will not come on. In the post above, are you suggesting that it could just be the power cord itself?

Sounds like a dead power supply. You may mant to have it tested. Or if you have another computer perhaps you can switch the power supply and see if the known good one will make it work. If so, you found the culprit if not let us know and we can take a further look at the problem.