In theory it is possible if you have GMA onboard - but I don't think it is easy.
You have to modify your BIOS...
Afaik the M1420 is based on the Mitac 8050, maybe 8050D/DC.
The L1300 uses GMA graphics and is based on another 8050, I don't know which one (8050, 8050D, 8050DC, 8050IL,...).
But I don't think the BIOS is compatible.
Have a look at
http://mtc.mitacservice.com/visitor/v_FileDown2004C.asp , there are service manuals, too.
Regards
Aaron