…This content is for 1-days, 7-days, 30-days, 90-day, 6 months, and 1year members only.Login Join Now Post navigationDELL E6420 PAL51 LA-6595P BIOS MAIN + EC BIOS TESTED OK MacBook Pro 13″ 2020 A2289 Touch Bar 2 TBT3 820-01987 Schematic & Silkscreen