No video on BeeBox N3150

I solved changing the hdmi cable, the same cable that I used until 1 week ago in other pc

I have similar problems with some of you.
1. The red SATA cable is too wide and not flexible to install my 2.5 inch SSD drive (or HDD). Can I cut it into 2 parts (long way) as seems it is 2 parallel cables fixed together. That would be more flexible like that. Or better to ask for replacement from ASRock?.
2. My BIOS worked well wit 2x8GB GSkill memory installed. I use HDMI cable. But booting Win7 64 was unsuccessfull. Freezing at Language select screen. May be as I have only 32 bit boot.wim and not 64 bit boot.wim (if that is important).
Then I solved the boot issue starting to upgrade boot.wim and install.wim with ASRock USB3 drivers, then start Win7 install on another (not Beebox) machine that has USB2 ports. So Win7 was OK for a while on the Beebox from  my SSD drive.
3. I tried to make a good bootable pendrive to install Windows normally (for any case next time), so I tried to improve my BIOS setup and install drivers from ASRock SUPPRT CD. I am not an expert in UEFI (although used to setup hardware etc. for several years for myself), so may be I made wrong things there, as after installing VGA driver (using Utility from Support CD, it needed to restart, my BIOS started to behave starangely. First in the boot order a pXIE or similar DRIVE appeared and later my SSD (with Windows on it) did dot show on Storage in BIOS. After several try my BIOS screen never comes to screen. But pushing F6, F9, F10 somehow Win7 was still BOOTING well from SSD. Then I have modified Windows to use better with SSD.
4. Descriptions about modifying wim files are not precise. That is why most have frozen screen during boot. What machine to use (32 bit or 64 bit), what boot.wim to use (32 bit or 64 bit) if we like to install a 64 bit Windows on Beebox (indexes are described though for Win 7 version selection). Is the motherboard important (should it be ASRock) or the USB3 chip type is important? etc.
5. BIOS screen never comes again and Win7 is seldom booting in spite the blue light is on. It is pity as I know much more to solve the problem, but I canot access BIOS (and mostly Win7) on my Beebox. How can I reset BIOS to original (factory) defaults that worked at the beginning? Someone written that it is where the RAMs are, but I canot see a usual CMOS battery there. Should we take off the motherboard totally or there is a more easy way? Like pushing a button (what Function key, the blue light button? and how long) during swich on or after? I do not like to make things that hurt warranty. I think we should not hurt it by any BIOS settings or should be a serious warning if still during selecting an option there.
So we have several issues, BIOS settings, using Utility software from Support CD and optimal setup of Win7.
But my number 1 problem now HOW to get back the BIOS startup screen after power on, so that I can use my gathered knowledge to improve the issue with fresh Win7 install on fresh SSD for Beebox N3150.

Any help appreciated.

Nandi wrote: How to remove battery and how to shorten CMOS pad? I do NOT have BIOS screen during startup, but when Win7 booting I see the screen well. So HDMI is OK in my case.

The battery simply pulls.snaps out.

Shorting the pads, use a fittingly sized small flat bladed screwdriver. A pocket screwdriver. Remember to remove power BEFORE sticking a conductive object, screwdriver in this instance!, down into the box.

Thank you I found the pad according to User manual page 6

But it is not clear how to make it.
1. Disconnect power source and uncover the box.
2. Shortcut the pad with a crewdriver that shortcut both pins of the pad. Do it for 10 seconds.
But DURING this shortcut should the main power be ON or OFF? pag6 indicating power should be OFF during shortcut.
In some other systems (like Dell) there is a jumper for shortcut and the power should be on during the jumper on
3. In some systems ESCD contained in the NVRAM. So there is an other jumper to clear the NVRAM.
Is that the case here? If yes, then ESCD is not changing when clearing CMOS.
May be that is why for some of other people shorting the pad did not solve the problem?.
Or as the solution is different here sortcutting the pad (with power OFF) it also clearing ESCD (if any?)

What should I do?

Mains/power cord disconnected from the wall.

Short pads for 10secs