EEVblog 1663 - BM786 Multimeter REPAIR + InEr Error Investigation

Repairing a customers Brymen BM786 multimeter, and investigating the cause of the InEr error message on the input jack alert feature. Plus a giveaway to a local youngster. Keysight OLED meter repair: https://www.youtube.com/watch?v=CKdeqqo2diI 00:00 - A returned BM786 Multimeter with InEr error message 03:23 - Split jacks and input alert circuit 05:19 - In-Circuit probing TIP and Low Ohms mode. 07:19 - A clue? 08:05 - A need a new desoldering gun. Removing the input jacks 10:30 - Bodge testing of the input detection threshold 12:38 - Not one but TWO failed Megger Insulation meters! 13:50 - Megger testing the connectors at 500V 15:19 - Testing a 2nd failed InEr error meter 17:00 - Cleaning the input jacks 19:11 - Heating up the input jacks 20:18 - Getting desperate, removing the input jacks 21:49 - Getting really desparate, removing the input resistors 22:38 - Reassembling the original repaired unit 24:26 - Repaired BM786 GIVEAWAY Forum: https://www.eevblog.com/forum/blog/eevblog-1663-bm786-multimeter-repair-iner-error-investigation/ Web Site: http://www.eevblog.com Hardware Store: https://eevblog.store/ Merch Store: https://www.teepublic.com/stores/eevblog?ref_id=37825 If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog Or with crypto: BTC: 33BsprBQNBtHuVzVwDmqWkpDjYnCouwASM ETH: 0x68114e40ff4dcdd384750500501e20acf3875f8c BCH: 35n9KBPw9T7M3NGzpS3t4nUYEf9HbRmkm4 USDC: 0x68114e40ff4dcdd384750500501e20acf3875f8c LTC: MJfK57ujxy55su4XicVGQc9wcEJf6mAoXF Other channels: EEVblog2: http://www.youtube.com/EEVblog2 EEVdiscover: https://www.youtube.com/eevdiscover #ElectronicsCreators #Repair #Brymen