failed solder joint

green electronics multimedia machine motherboard laptop microchip chip background device component wrongly formed joint services soldering iron brush electrical connection cold-soldered joints pcb solder resistance damage test open circuit shorts broken melting paste transistor semiconductor integrated electricity repairman repair maintenance deformed technical service technician electronic assembly printed board through-hole components issues engineering weak hardware equipment cold failed focused soldered point fail electronic-industry industrial microchip chip background device component wrongly-formed-joint electronics-services soldering-iron brush electrical-connection cold-soldered-joints pcb-solder-joint resistance damage test open-circuit electrical-shorts broken melting solder-paste transistor semiconductor integrated electricity motherboard solder repairman repair maintenance deformed technical-service technician electronic-assembly printed-circuit-board pcb connection board through-hole-components soldering-issues engineering circuit electrical electronic weak-solder hardware equipment circuit-board