WSJTX, Thetis or HL2?

[Jim KD4YLQ]

This morning after a couple of 40M FT8 contacts I went to higher bands (20, 17, 15 &12) and see red striped the full width of the waterfall on WSJT-X v2.80 improved. Thetis looks normal. I restarted the PC, Power supplies and software but it hasn't changed. on 30M the stripes sometimes lighten up and it almost looks normal. I hear the band filters clicking in & out when I change bands - what could be the problem? All bands worked fine yesterday so I very puzzled. Any help / ideas would be greatly appreciated!