1-3-1 suggests memory issues, try reseating the dimms. If no go try each dimm individually and see if it posts. If it does, then add a dimm to the next slot and then the next etc. This is to check whether it's a dimm or the slot on the mobo
Attempting to BOOT a poweredge 1850 but no video signal is reaching the monitor. On power up i have an amber flashing light A single BEEP , followed by a PAUSE , followed by 3 X QUICK BEEPS , a PAUSE , followed by 2 QUICK BEEPS. Have tried:  using both PSU units insalled. 5 amp power lead 13 amp power lead different mains sockets I have another 1850 running fine un the same rack. Monitor works fine with other servers.   Any idea what this BEEP sequence means ?   Thank you Scott          
1850 , no display on boot, sequence of beeps