Take a peek at what powers those popping pixels:

Texas Instruments SN74LVC8T245 8-bit dual-supply bus transceiver

Texas Instruments BUF16821 programmable gamma-voltage generator and Vcom calibrator

Parade Technologies DP665 LCD timing controller (the same found in the last generation iMac 4K)

Texas Instruments TPS54218 4.5 V to 17 V input, 2 A synchronous step-down SWIFT converter

Texas Instruments TPS54320 4.5 V to 17 V input, 3 A synchronous Step-Down SWIFT converter

Texas Instruments TPS65168 high resolution, fully programmable LCD bias