Tandy 1400LT display question

[rlauzon]

Playing with my Tandy 1400LT, and I notice that when the floppy drive is active, the screen backlight dims a bit.

Is that normal? Or should I be checking out the capacitors more thoroughly the next time I have it open?

Note that this is on AC power, not battery.

 

[vwestlife]

Mine does the same thing. So either it's an age-related issue they're all beginning to suffer from, or it's normal.