i’ve been using a gift tp25 for some years. it’s a special lenovo laptop edition that is similar to the t470 and t480. as the years have passed, it gets harder to find information on repairing this laptop online. last time or two ago i replaced the system board, i engaged a long list of substitute part numbers for system boards that would fit and boot. i haven’t found this list again. i originally made it by looking at simple commonalities on support.lenovo.com and ebay.com , but simple search terms do not return as many results now as they did before, and support.lenovo.com is only showing one system board now for my model number. i’m seeing these values in the bios atm: bios ver: N1QETA3W ec ver: N1QHT54W model: 20K70004US unit serial: PF12XKZP board serial: L1HF83M000D cpu: i7-7500u 2.7ghz uuid: 1f4bfcc-2c71-11b2-a85c-955ac813bb93 os license: SDK0J40697 oa3 id: 3305102936368 may have made copy mistakes the problem i have right now is that the system does not charge, instead emitting a pungent smell for some time after the charger is plugged in. i removed the bottom cover but