pc will not turn on. green to black jumping starts fan and power light

Jul 10, 2018
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HP PAVILION 6 YEARS OLD. I've UPGRADED VIDEO CARD, RAM, ADDED A SECOND IN CASE DRIVE.
MODLE NUM. A6200N
M.B. NETTLE 2 GL8E. BOARD NUM. MCP61PM-HM

HOPE THAT IS SUFFICIENT? THANK YOU
 


Which video card (GPU) did you get?
Could you elaborate about the issue you are having?
Did you upgrade the power supply unit (PSU)?