I looked up the HMM for this model.
Good news, looks like they use standard type hardware.
1. Power supply has standard mounts
2. System board has 24-pin connector
I fix quite a bit of lenovo products, and on their desktops this is not the norm.
Bad News - not much room for expansion. System board is smaller than a uATX, so probably ITX
2 dimms slots, 1 PCI-E on board...etc.