Clean all your grounds. My '90LX (195k mi.) did this earlier this summer. No electrical anywhere, very dim if any lights on the dash when you turn the key on, no lights, even the seat belt/key in ignition bell was very quiet. Replaced the starter, fixed for ~2 weeks and it did it again. had starter tested - good, replaced battery cables, again ~2 weeks. Finally got sick of the ~2week thing. I removed every ground cable I could find, battery->block, batt->body, braided strap->firewall, I know there's more but I can't remember where. Cleaned where they bolt on with a dremel & wire wheel (sand paper will work) & put them back on. Took about an hour, even checked them all with my multi-meter, Haven't had this problem sence. Car actually runs better too, doesn't try to stall when cold, idles smoother...