Notebook hp mini 110-300 error beep and it won't boot

Recently my old and only notebook got stuck and refuse to boot as usual, she only showing me black screen with information as shown in picture. After several hour I spend to open the case, clean it up because i think this problem happen due to dust or something block air in the netbook and checking ram, i take the RAM out and place it again but my effort is useless. The hp mini still beeping right after boot screen. And nothing happen.
Fortunately i found the answer unintentionally, it only need you press F1 button or fn+F1 if you didn't activate function button. Good luck