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No display on monitor and hard drive no start

\015 Compaq Presario 1430nx no display on monitor and hard drive no start\015

Answers :

Chek the SMPS output voltages
\015\012if it is low replace it
\015\012remove RAM, clean RAM by using a rubber at RAM contacts, replace RAM
\015\012disconnect the hard disk and switch on computer, if it has display, problem is due to hard disk or smps
\015\012reset BIOS settings
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