a1311 emc 2428 DEAD: ONE LED ONLY

phantom · Saturday at 8:55 AM

hello! i've an a1311 emc 2428 dead. only one led. i have 3v on power button.

even using tweezers, nothing happen. could you help me?

2informaticos · 2026-09-21T15:50:19+0100

What is 820-xxxx MLB code?
Do you get 3V3_SUS?

phantom · 2026-09-21T15:56:28+0100

i would like to not dismantle the board if possible....hoping a simple problem.... i will check for 3V3_SUS i think it could be 820-2492

2informaticos · 2026-09-21T17:18:58+0100

Maybe 820-2494?

Just in case, disconnect J6600 and test again.

phantom · 2026-09-22T11:02:03+0100

i think the board is 820-2641, i can't find the line 3V3_SUS

phantom · 2026-09-22T11:59:58+0100

i think the board is 820-2641, i can't find the line 3V3_SUS

all presents,
PM_SLP_S5_L always 0v

PM_RSMRST_L 3,3vRSMRST_PWRGD 3,3vSMC_RESET_L 3,4vSMC_BC_ACOK 3,4v

PM_PWRBTN_L 3,4v ->0 when press power button

2informaticos · 2026-09-22T18:13:04+0100

Check if PM_PWRBTN_L drops from 3V to 0V when press power button.

phantom · 2026-09-22T18:24:22+0100

Yes, i have confirmed it before