I rearranged my radio bench to add a 2^nd computer monitor and all is well expect when I turn on the 2^nd monitor it keeps breaking the squelch on my VHF/UHF radio (Yaesu FTM-7250).  It seems to be only on UHF and not all channels but is prevalent on 443.225 which is the frequency I monitor most often.  Even turning up the squelch from 2 to 5 (of 8) does not help.  The radio does not have a ground lug.  Any suggestions on how to isolate the radio from the monitor noise?  They are physically close to each other but I do not have space on the bench to relocate it to another convenient location.

Thanks,

Rich

W4RJA