Hi @aquelle ,
It seems as though the liquid spill on the keyboard has finally surfaced as a problem.
It is usually easier to replace the keyboard than to try and fix it. When trying to fix keyboards you can create more problems than what you originally had.
Unfortunately you have to completely disassemble the laptop to get to the keyboard, as it is part of the upper case assembly.
Here’s the [https://download.lenovo.com/consumer/mobiles_pub/yogac930-13ikb_yogac930-13ikbglass_hmm_201902.pdf|hardware mainenance manual] for the laptop.
It details all the necessary pre-requisite steps and procedures to remove individual components and disassemble the laptop. You will notice that it doesn’t mention how to do this for the upper case/keyboard assembly. That is because by the time you have done everything else that is all that is left.
On p.61-62 Item #2 you will find all the country specific part numbers for the upper case/ keyboard assembly. If you search online using the part number ''only,'' appropriate to your particular model variant you will get results for suppliers of the part. Usually the part number is to be found on the underside of the assembly if you wish to verify that you are ordering the correct one.
If doing all this seems too daunting to do yourself, contact a reputable, professional laptop repair service and ask for a quote.