Things it would be helpful to know (in order to solve this issue):
[1] Is this your first GNU/Linux-based operating system installation?
[2] Who installed it onto your computer?
[3] Have you read the "User Guide"?
. . . . The "User Guide" is available here: https://sourceforge.net/projects/manjarolinux/files/Manjaro-1.7.2-User-Guide.pdf
. . . . Clicking the preceding link should open a download dialog box where you can choose whither to download the guide.
. . . . Pages 23 through 27 of the "User Guide" explain burning the ISO to disc.
. . . . Pages 31 through 32 give a brief explanation of BIOS vs. UEFI
[4] Has Manjaro ever worked in graphical mode on your laptop?
[5] Which version of Manjaro is giving you problems?
. . . . XFCE?
. . . . KDE?
. . . . GNOME?
. . . . Architect?
❋ ❋ ❋ ❋ If you're using Architect, you will need to read and follow the instructions here:
https://forum.manjaro.org/t/installation-with-manjaro-architect-iso/20429
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😱 I must go to work now. If this question isn't resolved by morning (2108-03-26 07:00-ish US Eastern Time), and if you've provided more information, I'll come back to this question and try to help you out, if you so desire.
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I returned to this question at 06:44 US Eastern Time to find no new information from the OP.
So now I'd like to make some suggestions:
(1) As root, type: init 5
(2) Press: Enter
(3) Wait and see what happens
(4) If nothing happened, type: startx
(5) Press: Enter
(6) Wait and see what happens
(7) If nothing happened, Try reinstalling from scratch. Let Manjaro's installation wizard decide how to best partition your computer's entire HDD (or SSD, if that aplies) in accordance with the default configuration offered by Manjaro. [⇦ ⇦ If you cannot let Manjaro repartition your computer's HDD or SSD in accordance with "default" settings, because of dual-booting or whatever other scenario you have, then be sure to read up on partitioning for Linux.]
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For most home users, on old-style BIOS computers, three partitions are good:
[1] /
[2] /home
[3] swap
For most home users, on new-style UEFI computers, four partitions are good:
[1] ESP
[2] /
[3] /home
[4] swap
Here's the output of lsblk on my machine's main SSD, just so you can see.:
sda 8:0 0 111.8G 0 disk
├─sda1 8:1 0 256M 0 part
├─sda2 8:2 0 16G 0 part [SWAP]
├─sda3 8:3 0 25G 0 part /
└─sda4 8:4 0 40G 0 part /home
sda1 is my ESP drive. Some folks will say that fewer than 256 MBs is plenty. Some folks say that more than 256 MBs is recommended. I say: dociousaliexpilisticfragicalirepus (which is supercalifragilisticexpialidocious backwards ... not in reverse, but backwards; there's a difference, apparently).
[ESP is EFI System Partition]
https://en.wikipedia.org/wiki/EFI_system_partition