This is a hardware issue: an unrecoverable hardware error has occurred. The parameters have different meanings depending on what type of CPU you have but, while diagnostic, rarely lead to a clear solution. Most commonly it results from overheating, from failed hardware (RAM, CPU, hardware bus, power supply, etc.), or from pushing hardware beyond its capabilities (e.g., overclocking a CPU).
What cpc2004 is suggesting, is that it may be the L2 cache ram that is bad.
If this is the case, then your cpu is faulty.
Things you can try are.
Unplug your computer from the mains, and open your case. Clear the cmos by either using the jumper on the mobo, or by taking out the cmos battery for a couple of minutes.
Cleanout any dust, making sure that there isn`t any in the ram slots.
Clean the contacts of your ram stick with an eraser, and blow away the remnants. Put the ram back into it`s original slot.
Take off the heatsink, and clean off all the old thermal paste/pad from both the heatsink, and cpu. Apply some new thermal paste, and reattach the heatsink.
Now disconnect anything not required to boot your system. Just leave the cpu/harddrive/ram/videocard, and try to boot your computer.
Does your computer attempt to boot? Do you hear any beeps?
Regards Howard