questionsdebranded 25" hp monitor gets no signal input…

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1. unconnect and reconnect cable and power cord from both pc and power source (outlet or surge supressor)
2. try another cable from puter to monitor and do the same for the power
3. Check the menu options on the monitor after you see if any lights/signs come on the monitor (mine intially showed yellow then goes blue when a signal is received)
4. do not forget the actual number one rule after checking cables - reboot. this sounds simple, but reboot after checking each step. replace a cable - reboot etc.
Troubleshooting is quite lengthy when done correctly.

Follow up - are you using it as vga dvi or hdmi, through a card or through a standard motherboard with integrated graphics?

(someone want to jump in here, my troubleshooting skills are rusty)