Question Help identifying a chip on motherboard.

[apache23]

Need help identifying the chip in the pic so I can order one. 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. Any help would be appreciated! Btw, this is near the battery connection terminals on an HP Omen 15.

 

[Fanatical Meat]

I’m no expert so I don’t want to guess however per previous threads replacing a chip or circuit on a motherboard is next to impossible to do because:
Chips are usually bought and all used up so finding a replacement is impossible
You need to have an amazing skill level to successfully replace the part.

Sorry to be the bad news guy.

 

[Mr Evil]

The number printed on the board next to it starts with Q, which is commonly used to denote a transistor, so you're likely right that it's a MOSFET. Looks like the package itself is marked with "3D" and "U5", which... I can't identify, sorry.

 

[Ichinisan]

Yeah. Looks like a SMD (surface-mount device, as opposed to through-hole) MOSFET -- or maybe some transistors also look like that?

MOSFET typically uses a low power circuit to activate a high-power circuit. Kinda like when you power-on modern game consoles and other electronics - they no longer use the big crunchy power switch to activate main power to the rest of the system.

 

[apache23]

I’m no expert so I don’t want to guess however per previous threads replacing a chip or circuit on a motherboard is next to impossible to do because:
Chips are usually bought and all used up so finding a replacement is impossible
You need to have an amazing skill level to successfully replace the part.

Sorry to be the bad news guy.

I've soldered many chips onto many boards, I just usually have the chip already. I have never had to order one. For this chip, I would use my small heat gun that has a tip for focusing the heat onto a small area. The hole in the tip is about the size of a pencil. It's pretty easy if you have the right equipment, but if you don't, you will most likely fail.

 

[apache23]

The number printed on the board next to it starts with Q, which is commonly used to denote a transistor, so you're likely right that it's a MOSFET. Looks like the package itself is marked with "3D" and "U5", which... I can't identify, sorry.

Yeah, it's not an easy one to identify for sure. I've now spent about 4 total hours looking and nothing even close to those markings. I'm about to just pull a random chip from another board and try it. I have another HP that has a chip that looks identical and it is near the battery connection area as well. My other option is to buy a new board, so nothing to lose. But I'm going to hold out for a little longer in case someone steps up and surprises me...lol.

 

[apache23]

Yeah. Looks like a SMD (surface-mount device, as opposed to through-hole) MOSFET -- or maybe some transistors also look like that?

MOSFET typically uses a low power circuit to activate a high-power circuit. Kinda like when you power-on modern game consoles and other electronics - they no longer use the big crunchy power switch to activate main power to the rest of the system.

It's definitely a SMD and yes, some transistors do look like this. But unless I find something with same markings I will have no clue as to the needed part.

 

[CZroe]

I’m no expert so I don’t want to guess however per previous threads replacing a chip or circuit on a motherboard is next to impossible to do because:
Chips are usually bought and all used up so finding a replacement is impossible
You need to have an amazing skill level to successfully replace the part.

Sorry to be the bad news guy.

This one is very possible if the component can be identified. Perhaps someone can find the schematic for this board.

 

[Mr Evil]

Have you tried mapping out the surrounding circuitry? If you can work out what's driving it, and if it's used for switching a load or something else, then you might be able to guess roughly what sort of MOSFET it should be, and replace it with something close enough to work.

 

[apache23]

This one is very possible if the component can be identified. Perhaps someone can find the schematic for this board.

I've been looking for the schematic for days online and nothing. That would be too easy...lol.

 

[CZroe]

I've been looking for the schematic for days online and nothing. That would be too easy...lol.

What is the board designation/model?

 

[apache23]

Have you tried mapping out the surrounding circuitry? If you can work out what's driving it, and if it's used for switching a load or something else, then you might be able to guess roughly what sort of MOSFET it should be, and replace it with something close enough to work.

To be honest, I wouldn't know how to properly do the mapping. I have a (I guess) talent for chip-level soldering, so I have been asked to do so on many occasion. But I've never been the one to have to do anything but the desoldering/soldering. I could take detailed pics and post them if someone could figure it out. Thanks for the replies btw.

 

[apache23]

What is the board designation/model?

It is an HP Omen 15-5113dx

 

[CZroe]

It is an HP Omen 15-5113dx

That sounds like the model number. The logic board should have markings on it like xxxxxxx-601 or xxxxxxx-501 or whatever. That's the schematic we need.

 

[apache23]

What is the board designation/model?

Also, the board has only 2 stickers with numbers on them and nothing came up in Google when searching them. And the board itself has no serial numbers stamped on it or printed into it.

 

[apache23]

That sound like the model number. The logic board should have markings on it like xxxxxxx-601 or xxxxxxx-501 or whatever. That's the schematic we need.

I will post some pics of the board.

 

[CZroe]

Also, the board has only 2 stickers with numbers on them and nothing came up in Google when searching them. And the board itself has no serial numbers stamped on it or printed into it.

It'll likely be a silkscreen marking like we see for the transistor (Q250 or whatever it was).

Look for anything like these:

 

[apache23]

It's taking forever to upload these for some reason.

 

[apache23]

It'll likely be a silkscreen marking like we see for the transistor (Q250 or whatever it was).

Look for anything like these:

Here's the rest.

 

[apache23]

It'll likely be a silkscreen marking like we see for the transistor (Q250 or whatever it was).

Look for anything like these:

Yeah, I get what you're saying. I've had to look up quite a few mobo's in the past to find RAM compatibility, CPU comp. etc, but this one has nothing that looks remotely close to a normal mobo serial. Very strange.

 

[DAPUNISHER]

Need help identifying the chip in the pic so I can order one. 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. Any help would be appreciated! Btw, this is near the battery connection terminals on an HP Omen 15.

The 3D indicates it is BC856. And if HP stuck to their SOT-23 scheme, the U5 indicates unconnected pair. Hope this helps.

 

[CZroe]

The 3D indicates it is BC856. And if HP stuck to their SOT-23 scheme, the U5 indicates unconnected pair. Hope this helps.

A few more SOT-23 NPN transistors marked "3D:"

Marking of electronic components, SMD Codes 3D, 3D-, 3DG, 3DW, 3Dp, 3Dt. Datasheets BC856, BC856W , MMBTA44, MMBTA44G, RB715F.

Marking of electronic components, SMD Codes 3D, 3D-, 3DG, 3DW, 3Dp, 3Dt. Datasheets BC856, BC856W , MMBTA44, MMBTA44G, RB715F.

www.s-manuals.com

 

[Mr Evil]

The 3D indicates it is BC856. And if HP stuck to their SOT-23 scheme, the U5 indicates unconnected pair. Hope this helps.

It can't be a pair with only 3 pins.

 

[apache23]

A few more SOT-23 NPN transistors marked "3D:"

Marking of electronic components, SMD Codes 3D, 3D-, 3DG, 3DW, 3Dp, 3Dt. Datasheets BC856, BC856W , MMBTA44, MMBTA44G, RB715F.

Marking of electronic components, SMD Codes 3D, 3D-, 3DG, 3DW, 3Dp, 3Dt. Datasheets BC856, BC856W , MMBTA44, MMBTA44G, RB715F.

www.s-manuals.com

I really wish I knew what all that meant. I'm not knowledgeable at all with electronic components. I can just solder pretty good...lol. And still can't find the chip to order it.

 

[apache23]

A few more SOT-23 NPN transistors marked "3D:"

Marking of electronic components, SMD Codes 3D, 3D-, 3DG, 3DW, 3Dp, 3Dt. Datasheets BC856, BC856W , MMBTA44, MMBTA44G, RB715F.

Marking of electronic components, SMD Codes 3D, 3D-, 3DG, 3DW, 3Dp, 3Dt. Datasheets BC856, BC856W , MMBTA44, MMBTA44G, RB715F.

www.s-manuals.com

My bad. See, I didn't even know what BC856 meant until I looked at the datasheet...lol. Looks like the right part, but I really know nothing, so I'll just have to try it and see.