['Willcom D4' UMPC] 8 Problems Crop Up [Part 1]

My main mobile PC, a

My main mobile PC, a "Let's Note CF-W4" (left, 12.1-inch), the old famous mini PC "Libretto 60" (upper right, 6.1-inch) and the "Willcom D4" (bottom right, 5-inch wide). The D4's LCD panel is distinctively brighter and more vivid than the other two. I switched on the Libretto 60 for the first time in almost five years, but it started up without any problems, other than the fact the battery was drained.