信息
September1,1981,oftheirnewslimline seriesofcalculators,codenamed Voyager,beginningwiththeHP11Cand HP12C.WhiletheHP11Cwas discontinuedinearly1989,theHP12C becamesuchastandardinthefinancial sectorthatithasbeencontinuouslysoldHP12C forover41yearsasofthiswriting. TenmonthsaftertheHP11CandHP12C,HPintroducedtheHP15...
https://www.manualslib.com/manual/1627272/Hp-Slimline-270.html?page=3#manual Desktop cleaning https://www.crucial.com/articles/pc-builders/how-to-clean-the-inside-of-a-computer#clean If the fan blades do not spin properly then replace the fan I think this is your cooling assembly It a...