Hello, this chip is overheating when the power button is pressed. I do not have the schematic. It has a stylized H with letters A03 then FKH0072 underneath.
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Re: help identifying chip off LA-E801P
seems like a mosfet -
Re: help identifying chip off LA-E801P
You must clean the surface of the chip so you can read the sculpture clearly.
Rub the surface of the chip with the help of thermal grease or cigarette ash, it will help read the mark.
It is very important to determine whether the mark shows the type of P-Channel / N-Channel or Dual-Channels mosfet.
the picture looks like a product of Excelliance MOS
example: EMB20N03VComment
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Re: help identifying chip off LA-E801P
Thank you for your answers. On the board, it is marked as PQ302. I'm doing the thermal paste rub now, no smokers here, good tips.Comment
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Re: help identifying chip off LA-E801P
Added new pic, rubbed white thermal paste, then a drop of alcohol. Website of excellencemos keeps timing out, can't get in.Attached FilesComment
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Re: help identifying chip off LA-E801P
Seems to be a: emb09a03hpComment
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Re: help identifying chip off LA-E801P
My usual suppliers, digikey and mouser electronics, do not carry that manufacturer. Compatible replacement? in same package, EDFN5*6
Thank you RJ for the datasheet.Comment
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Re: help identifying chip off LA-E801P
Found this one that is similar, listed as 30V Dual Asymmetric N-Channel MOSFET AON6994. It has Id of 50A and 82A in datasheet but listed as 19A and 26A. Original has Id of 15A on both. Is it Ok to use it? Is more amperage better or worse, please advice.Comment
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Re: help identifying chip off LA-E801P
If it can handle more amps, that will be ok. Are you sure this is the problem with the over heating, or is there too much load that is causing the mosfet to overheat?Comment
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Re: help identifying chip off LA-E801P
chip displays 0.4 ohms in both directions when checking from D1 to S1, 42Kohms from D2(neg probe) to S2(pos probe) and 0L from S2(neg probe) to D2(pos probe) also there is 0.4 ohms between D1 and D2
Laptop went up to over 2 amps when pushing power button, had to disconnect right away, I burned my thumb when pressing chip. After it was removed, laptop goes to just over 500 mA, but fan wont start. It didn't start before removal either.Comment
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This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.
There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as... -
Common SPI bios chip programming Questions and Answers
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Q: I have a bios request,i can`t post my backup as i can`t read from the chip.
A: If you can`t read from it how do you expect to write to it ?.
Q: Why is my bios chip unreadable ?.
A: The programmer is faulty or has a worn or broken zif socket.
The USB cable is frayed,connector pins worn or some other physical damage.
Not enough amperage or voltage to power the programmer properly.
Bad...09-02-2021, 04:40 PM -
This chip is shorted thru. Based on what I see, it's either a 3.3V or 5V buck converter, just my guess. The markings on the chip state "S2=AB".
A photo of the chip is attached.
Thank you.... -
Hi,
Not sure whether anyone can help but I'm trying to identify the IC chip in the photo below.
I purchased a faulty Bush DAB radio (model # BD-1801) and identified that an IC chip was blown on it. Unfortunately, I couldn't read the manufacturer name / model number of the IC chip.
I purchased another (working) BD-1801 so that I could open it up to find out the IC details - but the IC chip details are missing (as you can see in the photo.)
Given the two huge blobs of solder either side of it I'm guessing it regulates power(?)
Anyone... -
Long story short:
- dad converted Asus Chromebox CN62 into Windows compatible, with mrchromebox BIOS, years and years ago
- gave the computer to his son a couple years later
- son now decided to revert it to Chrome OS, to sell it as original (re-writing BIOS with the backup one created by his dad)
- too lazy to remove the board from the case, thought a voltage regulator was the BIOS chip (you know... it has 8 legs)
(seems like the story was not that short)
He used alligator clips to read the chip. No luck reading it. Removed chip and placed on a SOC-8...
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