Are you disconect the battery wile you soldring point or soldring point and the connector is conect by mistake???
Black secreen not reson that clk is broken you can jumper it If there clk copper line you need microscope.
Desolder cpu need very good work or will kill it easy.
Read all point...
When I enter the EMUMC partition, the official system and Syscfw system I watch the screen show two white color lines time appearance logo atmosphere logo and show the official Netindo screen logo and does not appear something checked Points and check DAT0 cleaning Motherboard Nothing There is...
Joycon buzzing play cult of lamb and 3 to 4 days the adapter move littel bit and the cfw not working so i open console and fix adapter with new one add bit more iron under the point that conect to dat0 iron ball and to gnd legs and now cfw working... 👏
I see the stroge internal mmc is only 17 gb i look there for any games but nothing all game on emummc only and partion emummc in sd 29 full... It is128 gb sd card is it normal V2 console i mode it 2 days ago...
I finsh mod V2 console 18.0.0 fw and chose emummc it is working fine with hats pack 17.0.2 and when try go cfw it show error msg host pkgl... Ofw after nintendo logo black secreen.
You
Need boot1 boot0 and prod info. For Orginal your oled... If no chip on motherboard are fulty and is mmc reson so buy Samsung mmc and send to repaire shop only... 👏