Connecting HP 2009m monitor won't connect to laptop with HDMI to VGA adapter

[Azha198]

I can't get my HP 2009m monitor to connect with my MacBook laptop. I purchased an HDMI to VGA adapter. When I connect the cable and adapter together and then plug into my laptop the screen on my MacBook flickers (or blinks continuously). But nothing happens when to the desktop monitor. The monitor says the cable undetected and goes to sleep. 

I've bought multiple HDMI to VGA adapters because I thought the cables were faulty. Now I think there's something wrong with the monitor or my MacBook. 

[savvy2]

well lots of adapters are junk (vast reallY-

but on any laptop, 90% of them you have hot key to tell the LAP to turn on the external port. I do not do apple ever. so.. no comment there. but RTM on the MacBook.  (i boycott apple) so...

VGA to HDMI is not very good, not at all, for adapters,  after all VGA is dumbb(sic) and HDMI is smart,

ok the monitor is vga/dvi-d (factiod #1)

so smart HDMI to VGA dumbb. got cha.

why not first grab a TV connect it to the MAC via hdmi, direct. and prove it works , it will not until you hit the  apple hot key that does this (auto,internal,external, both) see?????  learn that auto may fail  due to you using adapters,

using (btw) external html  on the apple. we  do this on projectors vast and often, so is no big deal, learn the rules.

the ways this can fail are many.' but short:

• The adapter needs power (chip vga) FROM HDMI AND if  there is none, apple end fails for hot plug. or above
• the PC Apple  port does PnP and talks via,  the edid chip in the adapter but gee VGA can not talk edid comms, so the PC can not identified that old monitor (means no HDMI or DP),  see? lots of things must work to do that.
• next if this far? the PC or monitor does not allow guessed at resolutions and blocks (out of range)
• oops that adapter is sold in 2 ways,  HDMI>>>>VGA and the reverse and never both. ok? one more rule .
• the Power pin on HDMI must be active. (some cables do not do hot plugging !! means boot the mac to work)
• Some adapter do not work at all for apple, due to totally different PnP (edid chip) rules of logic.

I have only one thing  to say test the mac, to TV first hdmi to hdmi,  if that works move  on to HP monitor.

learn when buying adapters here, ask sellers 2 things (hdDMI to VGA direction) and if mac, will work,.   bingo , win?