My S5 has been working fine until recently. Now only one of ASIC boards seems to be working. 

The second board only shows like:

-o---o-- -----o-- -------- ----xo.

Somtimes more of the ASIC chips shows up and somtimes the board wont show up at all.

Any ideas what might be wrong? I havent touched the connectors, and I know that the power supply is OK.