I have problem with Switch cat 2960 it no leds appear and the fan work and cannot access console. Plz help

I have problem with router 2921 it restart and get in console:" WARNING: DDR ECC errors detected!Memory POST Test FailedFailed all 0xffffffff testBad RAM at location 0x8040375C: wrote 0xFFFFFFFF, read 0xFFFBFFFF%%ERROR: DDR memory test failed! Stop.W...

Can you help me Cat c6509-E reload connect console  I see : Initializing ATA monitor library...Self extracting the image... [OK]Self decompressing the image : ############################# [OK]              Restricted Rights LegendUse, duplication, o...