Vacuum Cleaner PCB Fault - How To Repair Electrolux Pure C9 PC91-4MG

How to disassemble vacuum cleaner Electrolux PureC9 PC91-4MG. Motor on maximum suction power after few seconds stops. How to repair Pure C9 vacuum cleaner / replacement of electronic board. Vacuum cleaner doesnt work on maximum power. Assembly process. Model: PC91-4MG 900279227-00 Part number: 140075397129 / 140120842046 (old) Suitable for: LX9-3-?KO LX9-3-CR LX9-3-MG LX9-3-OKO LX9-3-STM PC91-4IG PC91-4MB PC91-4MG PC91-4MGT PC91-4RR PC91-4RRT PC91-6MB PC91-6MBT PC91-6MG PC91-GREEN PC91-GREET Chapters: 0:00 Testing 0:20 Disassembly 5:59 Circuit board 140075397129 6:30 Comparison & PCB replacement 9:30 Testing new PCB 10:30 Reassembly 18:35 Final Testing after replacement #disassembly