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Early Toshiba laptops - Faulty 1000uF 6.3 volt capacitor
I am about to point you to a web site that discusses a common problem in certain early Toshiba laptops, that problem being a faulty 1000uF 6.3 volt capacitor.
Your early Toshiba laptop may or may not have that capacitor.
If it does have that capacitor, that capacitor may not be the cause of your computer's problem, or maybe it is one of multiple problems.
The web site is at here.
Example capacitor in T1910CS (see post #11)
Example capacitor in T1920CS (see post #4)