yes dear, previously we have discussed problem of tray of the same model finally it was concluded that pim has changed all the tray as lot defect.
now the problem u r saying of the lead module i have also faced that with all these ecg. the problem is very intermittent but you can tackle to remove atleast for longer time .
problem is the connectivity of all the in and out cable is not very confirmed . many of the time its loose or inside the module its fragile . we can call it again as poor quality of this module . dont know how pim qa passed all these. probably they want more biomed eng. to be employed in hospi
ashoke