What a bummer.
So today is when a lot of things came together.
First of all, I finally got my Cirrus Logic GD5446 PCI graphics card from Canada for my Pentium MMX 233MHz DOS build I'm doing, which would allow my motherboard (Asus TX97-XE) to actually display things. So, I insert it into the motherboard, everything (expect a Gotek floppy emulator; still waiting for another one) is plugged in, I turn on the PSU's power and... wait, why did my motherboard just turn on without me hitting the power button?
It seems that whenever power is sent to the board (i.e. when the PSU is turned "on"), the fans connected to the board will start to spin and the power LED will just flash on-and-off like a pair of car headlights, but nothing happens. The board refuses to POST, and you can't "shut it down" via the power button. I've even tried things with just the CPU socketed (no RAM, expansion cards, or connected drives) and both with the Pentium MMX 233MHz that came with the motherboard and a separate one that I had also bought, all resulting in the same behavior. I also removed the I/O shield, even held the board slightly out of the case, and cleared the CMOS, and still the same behavior.
Could anyone tell me whether or not this means that the motherboard is "fried", or is there something I'm missing? I would hate to have been left with a broken motherboard.
Moving on, yesterday, after I had finished re-assembling it back together with a replacement CMOS battery and new thermal pads, as well as today, I tried to turn on my Asus Eee 4G PC, and it looks like it is running (with the power light and sometimes the wifi light coming on), and yet nothing is ever displayed on the laptop's screen, nor does any signal come out of the laptop's VGA port.

I made sure all of the internal cable were re-attached to where they were supposed to be, so I doubt I just connected some cables wrongly or not at all. So, again, I ask: Does anybody have any idea what is going on? I can't think of any reason why it is doing this other than either I somehow damaged the laptop, or that I have to somehow reset something.
Finally, for once, some good news. That OG model 30001 PlayStation 2 I had also recently acquired for $10 has been put back together with a new CMOS battery and new thermal pads, and it works! It boots up, and plays DVDs just fine.
I was curious, though, looking through the settings:

I was using the former connection method (Y Cb/Pb Cr/Pr) instead of the latter (RGB), and can only use that method with my 5RCA+VGA-to-HDMI converter, but that brought up the question: what's the difference between the two methods, and which on is better?
Any help would be appreciated. 😀