Having problems with your Dell Dimension 2400 PC Desktop ?

PC beep 5-2-2-1 code on startup, no posting

\015 I'm getting a new PC because my Dell 8200 mobo appear to have die. I try to upgrade my memory from 512MB to 1GB. These are expensive Rambus memory. The type are Non-ECC. I got by mistake, ECC type. But I install them anyway because I was told they could be mixed as long as they are matched in pair. After installed them and power up, pc won't boot(no video) and hear a beep sequence of 5-2-2-1 and LED at back panel are green, yellow, yellow, yellow which according to Dell manual "no memory detected". Took new memory out and put everything back as before. PC will not boot and beeping. I RMA the new memory and received the correct one. They are the same Samsung part # as the original one. Install them. Still won't boot. Try different combinations. No good. Try to reset BIOS by removing CMOS battery. No good. Talk to Dell. They said I should buy memory from them at $400. They think the memory was incompatiable and may have shorted out the mobo so that even when I put the old memory back it didn't matter. I don't have tools to see if memory is getting power. The mobo light is on, the fans are on as are the drives. I don't know what else to try so. I suspect the mobo did not like the memory and won't boot and is stuck in that state(remember) no matter what I do. I may be wrong about that. So if anyone have a suggestion/solution, please let me know.TIA\015

Answers :

There has been an issue with 2400 ... i am sure this is not a memory card issue as it is u will be shocked to know this ... GYYY is not listed with dell as a failure ... the memory card failure is YYGG and but again the beep code that u said are 5-2 2-1 means compatibilty of memory cards so either is come confusion ... u can try one thing .. which i am sure may resolve the issue ... reseat the processor and heatsink
I would try a few more things:

just make sure that the memory is correctly installed in the correct slots to make matched pair, RAMBUS memory must be paired exactly. If they are not in the correct slots, they will not work.

The price of the memory is probably more than a refurbished computer that performs much higher. I would keep trying to swap the old memory I had, and return the new memory.

Make sure to Flee power each time you switch memory between slots (although board may be done)

Flee Power
* Disconnect the power cable
* Hold power button for 15 seconds
* Release the power button
* Plug in power cable
* Start the computer
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