E5-511 blank screen after mobo replacement

etafig

A while ago I shorted my laptop out via an arduino tinkering session. It's an acer e5-511, the 2.16ghz model.

So I replaced the motherboard yesterday, and noticed the ram had some corrosion so a new stick is in the mail.

Upon boot attempt, just a blank screen. No backlight or anything. Leds light, fan spins, I can hear the hdd spin up. What's odd to me is there is no beep from the mobo to give status.

I have confirmed the screen is well seated. Upon inspection I noticed that I have a different power adapter (the right one is in the mail) than what's required, it's a 40w where the Acer required a 65w. To me that should make no difference once the battery is charged since the battery would then be providing the power. I also attempted an external monitor via vga, known good, to no avail.

The cmos is soldered, I made multiple 30 second attempts at shorting it,that doesn't seem to be the issue.

So the curiosity is would no/bad ram cause the screen to not be activated? Also why no beeps? Any and all suggestions and information appreciated

etafig

Update to this:

I did get my new stick of ram in, as well as the power adapter. Results are the same, fan on, leds on, hdd spinning up, no display both on screen and external via vga.

Could I have gotten a bad motherboard in, or is the lcd gone bad more likely?

I'm pretty stumped at this point, any help would be greatly appreciated.

etafig

Update to this:

I did get my new stick of ram in, as well as the power adapter. Results are the same, fan on, leds on, hdd spinning up, no display both on screen and external via vga.

Could I have gotten a bad motherboard in, or is the lcd gone bad more likely?

I'm pretty stumped at this point, any help would be greatly appreciated.