My Dell Dimension tower was recently knocked of the desk by my cat sleeping on top of if. Now it beeps 2 time and 2 times again, fan and everything appears to be running but nothing coming on to the monitor. Can you offer any suggestions?

1a Research your blinking amber lights and the ABCD's. If the specifics don't explain a LACK of power (because even a shorted USB device can sap your juice resulting in a no video condition for example) try these:

Steps to get any PC running again:
1. Remove all addon cards and HD's CD's, so all you have is video, keyboard, and mouse.
Try it - if you see any video, add one thing back at a time starting with your boot and other drives. When it dies again, there's your problem...
2. Reseat the RAM and CPU
Try it, if it works you fixed it until oxygen does its thing again in a year or two...
3. Test power supply voltages with a meter, just test a hard drive connector, red and yellow are positive and the 2 blacks are grounds you should have both 12 volts and 5 volts, (plus a couple lower voltages for the CPU and RAM on the MB, disregard for now) if 5 and 12 are there, test that they have good amperage (over 1 amp will *usually* mean you have full power)
If it still doesn't work, it's either a power supply problem with the lower voltages, or a motherboard problem, retry steps 1 and 2 a couple times, then...
4. beg borrow or (eeek! buy) a power supply...

80 or 90 percent of the time, you won't get to step 3, let alone 4, all that's left is the motherboard, etc. good luck

If the POWER Button on the TOWER is blinking AMBER (Yellow) then the most likely failure point is the POWER SUPPLY in the Tower.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817226001

Typically, it's a memory problem. If you have multiple memory modules, leave one in the CPU at a time and boot your system todetermine which module is bad. Good luck.

1. Check your RAM speed

2. Install the old RAm and see if the problem persists

Most of the connections only fit in one place ...

Here is the Service Manaul for the 2400 Dimension.

http://support.dell.com/support/edocs/systems/dim2400/en/sm_en/index.htm

bought a new one. thanks! rg

Hi,
If the problem is not resolved after reseating the memory modules the problem more or less seems like a motherboard failure. Use the following troubleshooting steps to pin point the problem

http://tinyurl.com/bhl7xx


Thanks
Proton

reaaatch harddisk connection .clean ram and refix it .then check again u get beep then open procesor fan then clean the processor.

I would open the unit and verify that the CPU and power supply fans are working.
If they are, I would clear CMOS.
For the following steps, power off unit for each step:
If that does not work, I would (1) reseat the memory, (2) reseat the adapters which you may have installed.

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

iv had this problem , you'll have to put the correct disc for the comptuer and start over again :) otherwise you mite aswell just throw your comptuer out.