Question Converting my tablet to set top - question on display and power switch

[hw_user]

My Android tablet has a broken power switch. Once the tablet was powered off, it took many tries and with some luck, it powered on again. It is a paper weigh right now. It has HDMI out which makes me think that I can easily convert it to a set top box. I need help on two questions

1. If I am connecting the HDMI out to my TV, I want to disconnect my tablet screen. I opened the tablet already. I saw the screen flat cable connector. I am wondering if I can just disconnect it. Will that cause any problem to the screen driving circuitry when I run the tablet as a set top box for hours ?
2. I saw 3 solder points on the power switch. I think a regular on/off only require 2 points. Is there any standard circuit diagram for tablet on/off ? I will need to remove that bad switch and replace it with an external toggle switch so that I can turn it on and off easily.

 

[kerberos_20]

1. you will need to try it, theres off chance that linux boot will get stuck
2. 3pin momentary push button is single pole, double throw (SPDT) , you can google this sentence to get some bigger momentary push button alternative

 

[hw_user]

1. you will need to try it, theres off chance that linux boot will get stuck
2. 3pin momentary push button is single pole, double throw (SPDT) , you can google this sentence to get some bigger momentary push button alternative

Thanks, I'll try once I figure out how to replace the power switch and update.
I think a SPDT switch is "common to A" or "common to B" depending on which way you flip the switch. I am a little confused how a single push of the power button can provide the double throw ? When it works, I just push the button, the tablet will power on. If I push it when the tablet is already on, it will ask me if I want to power off the tablet. But I think the later part is software control.