hi every body
i have a defibrillator zoll m series that display error " test bridge failed"
in service manual wrote to change bridge board or HV module,
but i should repair it.
i found 3 IGBT that ruined and i changed them, and i tested other part on bridge board but i didn't any broken part.
the HV module is sealed with a material like clear glue that i cant open it for repairing. have any body seen this problem ever?
please help me
for direct contact my email is: s.aghakhani@gmail.com