I read a thread from 3 years ago that has since closed, but there was no answer. I’m posting the exact same problem.
My Optiplex 320 MiniTower that we bought new when it came out all of a sudden won’t boot. The 1 light blinks once, then 3 and 4 come on steady. I reseated memory modules. No luck. Went to MicroCenter and bought new RAM. It was DDR2 SDRAM for 667MHz and below. Installed. Same problem except received beep code 1-3-2 plus lights 3 and 4. Took it back and bought DDR2 SDRAM 800MHz after reading this on Dell website and STILL have problem. Tech there told me to unplug, remove battery, install new RAM, replace battery, plug in and restart. Same lights. 3 and 4 on steadily. Fan starts up then stops once lights come on. These are two 1GB modules – exactly what we already had in there.
NOTE: I am NOT upgrading - just replacing two 1GB units because I received codes, but Dell has different memory specs depending where you look. None of the 4GB upgrade info applies to me.
So - Dell info below contradicts itself. Also, someone on the Community Board said the 320 does not like anything about PC2-5300. WHICH IS THE CORRECT MEMORY? And does the battery removal info above make a difference? It’s not in the computer’s manual, but I tried it anyway. If I buy lower memory again and it still doesn’t work, what else could it be? I’ve received no other messages other than the memory beep code and 3-4 lights. Thank you.
From Dell’s own spec sheet :
http://www.dell.com/downloads/global/corporate/press/cwd_opti320a.pdf
2 DIMM slots, Non-ECC single channel shared
2 DDR2 SDRAM
(533MHz) up to 2GB system memory
From Dell Certified Memory Selector: Technology: DDR2 SDRAM Memory Speed: 800 MHz ( PC2-6400 ) Data Integrity Check: Non-ECC |
From Dell/Support/Optiplex 320/Parts & Upgrades:
Type | DRAM |
Technology | DDR2 SDRAM |
Form Factor | DIMM 240-pin |
Memory Speed | 800 MHz ( PC2-6400 ) |
Data Integrity Check | Non-ECC |
RAM Features | Unbuffered |
Module Configuration | 128 x 64 |
Thank you. - Kat