Hello everyone, I have a Dell Inspiron 15 laptop, motherboard dell vegas 15341-1.
The laptop does not start, does not provide 3.3V ALWS and 5V ALWS because it does not receive enable from EC (ALWON signal is missing). The ISL circuit provides ACOK for EC but EC no longer provides ALWON for the 3.3V and 5V ALWS source built with TPS51225. EC is supplied with 3V from 3VLDO from TPS51225. On the power button I have 3V and it reaches EC.
EC is on page 24 in the attached file.
Please tell me what other conditions can inhibit EC that not to provide ALWON? I looked at the schematic, but I can't tell if the EC is faulty or is it something else.
Thank you
MOD Edit: Link to schematic - https://www.badcaps.net/forum/showthread.php?t=79497
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The laptop does not start, does not provide 3.3V ALWS and 5V ALWS because it does not receive enable from EC (ALWON signal is missing). The ISL circuit provides ACOK for EC but EC no longer provides ALWON for the 3.3V and 5V ALWS source built with TPS51225. EC is supplied with 3V from 3VLDO from TPS51225. On the power button I have 3V and it reaches EC.
EC is on page 24 in the attached file.
Please tell me what other conditions can inhibit EC that not to provide ALWON? I looked at the schematic, but I can't tell if the EC is faulty or is it something else.
Thank you
MOD Edit: Link to schematic - https://www.badcaps.net/forum/showthread.php?t=79497
.
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