Laptop does not start, some SMD is blown, what is it?
I’ve got a laptop Acer aspire e5-573g that is not starting up. Looks like it is not getting any power at all. On one side of a motherboard on the other side of the DC connector there is an SMD blown that I cannot recognize. Check pictures.
Can anyone tell me what is this piece and where can I buy it?
Appreciate your help!
I have removed the blown part as shown in the picture her:
Doesn’t the marking underneath the blown piece indicate that it is a kind of a diode?
!!! UPDATE 2 !!!
I have checked the continuity readings from the plus pad and adjacent ends of capacitors. Readings are fine, I mean no continuity on opposite side of capacitor.
I tried to check for splashes or whiskers of solder on the components around without any obvious luck. Check some images:
I believe the latter image shows the PU11 IC and resistors PR127, PR128, PR229 located around it. There no seen defects except one black leg on IC close to the C letter as seen on the following images:
Could this indicate that IC has shorted? Or is it just meaningless debris? The leg looks kind of shorter than the rest as if it was burnt.
UPDATE 3 (and hopefully the last):
Ok.. the SMD part purchased was 1N4148WS-7-F - Switching Diode SOD-323 75 V 300 mA, Diodes Incorporated with the datasheet located her:
The piece is much smaller than original part on the motherboard, picture follows for comparison.
The piece was soldered as shown in the image and the laptop STARTED LIKE A CHARM!
Huge thanks to @oldturkey03 and @pleriche
Bu iyi bir soru mu?
Is the schematics taken from e5 573g motherboard schematics? Some other source claims it is transorb / tvs diode for overvoltage protection. Can this be right?
@oldturkey03 please take a look at the update I made to my question with the newest image. Wouldn't the marking underneath the blown piece indicate that it is a diode? or is it just to help to distinguish between anode and cathode of the capacitor?
@pawliux ok yes it does. Hold off for a bit. What is on the other side of the board? Let me convert this to a comment so that I am not misleading anyone.