Need help identifying the chip in the pic so I can order one. It looks to have "3D" and "U5 or maybe Q5" printed on it. I went on a couple sites to try and find it, but there are too many and I don't really know how to find it. I think it's a mosfet? of some kind. With some help on another site, I ordered 3 BC856 transistors as we thought this was the right part. But as you see in the 2nd pic, it's a little too big. Any help would be appreciated! Btw, this is near the battery connection terminals on an HP Omen 15 at location Q205.
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Help identifying a chip on HP Omen motherboard
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Re: Help identifying a chip on HP Omen motherboard
As they have already said, without knowing the model or card or notebook it is not easy to identify the part. All the components that
they start with Q, usually they are transistors but not always
With 3D the most common component is MMBTA44Last edited by jasko_jacker; 12-02-2019, 03:22 PM.
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by SMDFlea View PostWhats the motherboard part number,have you checked for an available schematic .
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by jasko_jacker View PostAs they have already said, without knowing the model or card or notebook it is not easy to identify the part. All the components that
they start with Q, usually they are transistors but not always
With 3D the most common component is MMBTA44
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by R_J View PostThis might help getting the right package, it is smaller that sot23-3 so maybe Sc-70 or SC-85Attached Files
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by apache23 View PostI found this datasheet and noticed that the pins on the UMT and UMT3 are numbered different. I was going to order both and try them, but now I'm concerned that I will get something wrong...lol. I guess it's worth a try though, because the motherboard is not going to fix itself and is now just a paperweight.Last edited by SMDFlea; 12-03-2019, 06:07 AM.
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by SMDFlea View PostThe marking codes don`t match. If you have the same part,with the same markings on another part of the board desolder it and test it with your multimeter to find out what it is or use a transistor tester.
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by R_J View PostWhat is wrong with the transistor on the board? is it shorted? or just check odd, because if it IS a digital transistor it will check odd (open) because of the built in resistors.
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Re: Help identifying a chip on HP Omen motherboard
Did you check the transistor on the new motherboard to see if it was NPN/PNP or maybe a MOSFET etc. It depends where it is used but it might just be a simple switching transistor, It could also be a custom number for the board maker
I do see a BC856W marking code 3Dt, Package style SC-70/SOT323Last edited by R_J; 12-03-2019, 03:50 PM.
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by R_J View PostDid you check the transistor on the new motherboard to see if it was NPN/PNP or maybe a MOSFET etc. It depends where it is used but it might just be a simple switching transistor, It could also be a custom number for the board maker
I do see a BC856W marking code 3Dt, Package style SC-70/SOT323
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Re: Help identifying a chip on HP Omen motherboard
Use your multimeter in diode test, with one probe on the base then with the other probe check emitter then collector should read around .6xx if not reverse the probes and check again, depending on which probe is on the base should determine the polarity.
Based on picture 1, the base would be on the left, emitter on the right, collector by itself at the top.
If the new transistor checks like the one on the new MB, you could likely solder it in place even though the leads don't quite match the pads you should be able to solder it on to try it.
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by SMDFlea View PostPost more photos so we can see whats around itLast edited by apache23; 12-03-2019, 05:33 PM.
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by R_J View PostUse your multimeter in diode test, with one probe on the base then with the other probe check emitter then collector should read around .6xx if not reverse the probes and check again, depending on which probe is on the base should determine the polarity.
Based on picture 1, the base would be on the left, emitter on the right, collector by itself at the top.
If the new transistor checks like the one on the new MB, you could likely solder it in place even though the leads don't quite match the pads you should be able to solder it on to try it.
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Re: Help identifying a chip on HP Omen motherboard
Originally posted by R_J View PostUse your multimeter in diode test, with one probe on the base then with the other probe check emitter then collector should read around .6xx if not reverse the probes and check again, depending on which probe is on the base should determine the polarity.
Based on picture 1, the base would be on the left, emitter on the right, collector by itself at the top.
If the new transistor checks like the one on the new MB, you could likely solder it in place even though the leads don't quite match the pads you should be able to solder it on to try it.
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