No Display Aspire 5253

Hello,

 My Aspire Laptop is booting as i could hear the fan running and lights showing up on the keyboard but there is no display on the monitor screen.

• I tried to connect an alternate monitor via a VGA cable and still no display.
• reseated the RAM and the HDD.
• The RAM and HDD are working on other laptops and computers.
  Kindly let  me know what should i do to have it working . Kindly assist