Before to start laptop appair the following error: 0270 real time clock error. save to disk file not found save to disk feature is disabled run phdisk for information.FILE:create new. PATIITION: consult manual. hit any key to exit.(d'ont work) f1 f10 boot computer setup if i press f1 it's start, can i resolve it? please help me! Compaq Presario 1255

Compaq is HP so best is to ask them, there, now here.
RTC error mean , the RTC coin cell is dead.
all PCs this old are dead battery ,
RTC= real time clock chip says IM DEAD, but is battery dead ,..

remove the coin cell, and put in a new one.
end story.
then set time .
best is to set time in BIOS setup. 1st.

this Compaq is 18 years old now. or 126 dog years.
id , push it off a cliff on the 4th July with fireworks. and all.
let me guess its XP the VIRUS magnet.
some this old are windows 98
a hopeless case there, no? no support, no books and no updates.
the books at HP are long gone
so now all books are , sold by horders. $$$
it can be costly and dangerous to deal with folks like that.

the book you lost , , the answer is on page 18
seen here
see coin, remove it and put in new one. end story.


https://www.manualslib.com/manual/30167/Compaq-Presario-Presario-1255.html?page=21#manual