I took the laptop to Micro Center, but they were unable to reproduce the issue. They told me it passed all their tests and that the cabling seemed fine. The same day I got it back though, the monitor again refused to turn on after the laptop was awoken from sleep. And today, a few hours ago the laptop automatically went into sleep mode. I decided to let it sit for a while to see if it would turn back on. It didn't, so I turned it off completely, and then powered it back on. Then, white zig-zag bars flashed on the display for about 5 seconds. After a while, the screen was still blank, so I turned it off and on again. On this boot up, the screen flashed white repeatedly before going blank. I let it sit for a little and then turned it off and on again. This time, it booted up as normal.
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