I've found the TC551001BTRL-85L 128k SRAM, it costs $10 in France (FF46). The retailer told me that it was unlikely to burn the calc with a bad component; the chip would burn but not the calc. <pre> -- )\/\/\/( - Nicolas Lannuzel - | | Etudiant en Prepa. | | Math student | ( o) o) mailto:nlann@cybercom.fr @ __) See my WEB:Maths&Calculators (in French...) | ,___| http://www.cybercom.fr/~nlann/ / / /____\ </pre>