Technical Support Toshiba A105 2.8V @ +V5A

[user58935]

Hi Tech Support,

I would like to ask what could be the possible reason why even if I de solder the connection of PAD1 from PIN1 & 2 Still I am getting 2.8V? from DC/DC 3/5 IC also I tried to inject 5V @ PAD1 PIN 2 there is no shorted component.

Laptop Model Toshiba Satellite A105

Thank You in advance

 

[Hosein Asadolahi]

Hi Tech Support,

I would like to ask what could be the possible reason why even if I de solder the connection of PAD1 from PIN1 & 2 Still I am getting 2.8V? from DC/DC 3/5 IC also I tried to inject 5V @ PAD1 PIN 2 there is no shorted component.

Laptop Model Toshiba Satellite A105

Thank You in advance

View attachment 52716

i'm confused . do you say pin1 of pad1 have 5v but pin2 of pad1 have 2.8v ?????
you write l1 have 2.4v but other side you write pin1 of pad1 have 5v ?????
b+ is present correctly ???
3.3v is present correctly ??
+v5la is present ??
did you check q4 and q5 with diod check mode on multimeter ?

 

[user58935]

Sorry for the confusion I did not edit it when I send it to you, after I isolate the PAD1 PINS (1&2) 5V is already present @ L1 and PIN1 of PAD1 but on the PAD1 PIN 2 I I.am getting 2.8V correct me if I'm wrong what I've seen is generated from +V3A came also within DC DC IC because of pull up resistor?