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No not hearing any beeps. This is what I had:
http://partsurfer.hp.com/Search.aspx?searchText=599661-001
And this is what I bought:
http://www.ebuyer.com/158634-crucial-2gb-ddr2-800mhz-memory-ct25664ac800
I tried to match everything but I guess I got it wrong.
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Try removing the offending article and run the crucial memory scanner.
http://uk.crucial.com/gbr/en/systemscanner/?gclid=Cj0KEQjw_YKtBRC7zZjFp8bF_foBEiQAfyigc41mUplIQAbWztivpOoIMjmcHohV1kwnpvE5i2HKLJIaAmwQ8P8HAQ&cmmmc=google--uk--brand--null&ef_id=U6K1dwAAAJT3QBN-:20150711112747:sIt could be of course that the bios limits the notebook to 1gb but the scanner will tell you this.
If it is the correct ram and the notebook can use the total quantity it should just work i.e. boot up.
You may sometimes get a message at boot time that the quantity of ram has changed.
Are you hearing any BIOS beep codes?.
http://www.computerhope.com/beep.htm