Keyboard controller NPCE985LLA0DX

viki2000
viki2000 used Ask the Experts™
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Laptop: Sony Vaio
Model: SVF152C29M
Product name: SVF1521B4E
BIOS Chip: Winbond 25Q64FVSIG
Motherboard: DA0HK9MB6D0 REV: D

The problem:
- The keyboard and the touchpad are not working at all anymore.

Questions:
1) Assuming I will be able to replace the Nuvoton NPCE985LLA0DX part, can someone tell me if this component needs programming or do I just buy it new and replace the existing one?
2) If NPCE985LLA0DX requires programming, then with what programmer do I have to program it and from where do I take the code/image to program it?

MotherboardKeyboard controllerBlock diagram
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Top Expert 2016
Commented:
From my google searching it comes up as an i/o chip
You have the 3mm balls and template and a hot air station and microscope?
only source worthwhile that I was able to find https://www.deltous.com/downloads/Chip.pdf
Top Expert 2014
Commented:
It's just surface mount, not BGA, I used to change that type of chip with a regular soldering iron. You cut the legs off the dead one with a scalpel, then clean the board up with a small bit on the iron.

Whether you can get the chip singly is doubtful. I can;t find the chip on manufacturer's website https://www.nuvoton.com

Edit: NPCE985LA0DX , you had an extra L hence no hits when I copied/pasted. Lots of single chips on eBay,
Yes, by mistake I have added and extra L. It is indeed NPCE985LA0DX.
I found them in China, I have already ordered 2, around 2.5-3€ each. I will get them in 3-4 weeks.
I have the tools, USB microscope and soldering irons various types. The hot air station I had, but not anymore.
As andyalder says, I know is possible also with only the soldering iron and tiny cutters for SMD or scalpel.
There are all kind of various techniques:
https://www.youtube.com/watch?v=UmD7F0--7Lc
https://www.youtube.com/watch?v=dCUSwADP6DE
https://www.youtube.com/watch?v=xMXJTLWyBCo

But my main point was: is that only an simple replaceable IC without any further programming?
As far as I understood, yes, I just buy it and replace it, without any further programming.
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Top Expert 2014
Commented:
Pretty sure it is not programmable. You can download Nuvoton NuMicro™ ICP Programming Tool and install it on a PC. Even without a programmer there is a HTML file of supported devices.
Supported_devices_of_Nu-Link.htm
That was a good idea.
Actually I do not have to download and install the software. There are pdf files with supported devices here:
https://www.nuvoton.com/hq/support/tool-and-software/software/programmer/?__locale=en
NPCE985LA0DX is not among them, so we can assume is not programmable.
Dr. KlahnPrincipal Software Engineer

Commented:
In terms of time and effort, I/M/O it would be simpler to get a replacement motherboard and swap the whole thing.  It would certainly be less risk as far as the outcome.

The motherboard can be had for $25 on the fleabay and I suspect a whole system would not be too much more.

https://www.ebay.com/itm/392312522999
Yes. you are absolutely right. There is only one problem with it: I am not in US, I am in Europe Germany and the shipping cost shows 65USD ! and I could not fond a cheap one on Germany eBay or other 2nd hand laptop repairing parts websites.
Now, that you brought the word, I found one new in UK at acceptable price: 29.91€ +11.74€ transport to Germany.
https://www.ebay.co.uk/itm/New-Sony-Vaio-SVF1521-Main-Board-Motherboard-Pentium-987-A1961831A-A1951374A/273047322166
https://www.ebay.de/itm/New-Sony-Vaio-SVF1521-Main-Board-Motherboard-Pentium-987-A1961831A-A1951374A/273047322166

It says has Pentium 987, while my motherboard has Intel i5-3337U.
I do not mind Pentium 987 as long as is on motherboard. I need to find out if it is there.
What is your opinion?
May I install the above motherboard instead of my motherboard if it comes with the CPU on it?
I mean the connectors, signals…do they match?

Update: eBay UK seller just answered :"I can confirm that the processor soldered onto the board is an Intel Pentium 987."
I changed my mind.
I checked the processor Pentium 987 and compared with i5-3337U and it is weaker:
https://ark.intel.com/content/www/us/en/ark/products/67194/intel-pentium-processor-987-2m-cache-1-50-ghz.html
https://ark.intel.com/content/www/us/en/ark/products/72055/intel-core-i5-3337u-processor-3m-cache-up-to-2-70-ghz.html
http://cpuboss.com/cpus/Intel-Pentium-987-vs-Intel-Core-i5-3337U
http://www.cpu-world.com/Compare/550/Intel_Core_i5_Mobile_i5-3337U_vs_Intel_Pentium_Dual-Core_Mobile_987.html
https://cpu.userbenchmark.com/Compare/Intel-Pentium-987-vs-Intel-Core-i5-3337U/m4947vsm737

The motherboard will fit to my laptop, but the processor is weak for nowadays.
In mean time I have ordered this cheap hot air station that I need also for other type of work and will arrive in 2-3 days:
http://www.china-zhongdi.com/product/26.html
actually this version from here:
https://www.komerci.de/shop/soldering/zd-939l-smd-hot-air-soldering-station-blue-white-with-lcd?sprache=en
Maybe later OI will buy a nozzle for 28x28mm, the size of the NPCE985LA0DX chip in the package QFP-128 pins:
https://www.aoyue.eu/aoyue-1129-heissluftduse-qfp-28x28mm-heissluft-lotstation.html
https://www.amazon.de/Akozon-Hei%C3%9Fluftpistole-L%C3%B6tstation-speziellen-quadratischen/dp/B07GDLBQF4?th=1
The chip itself was already ordered in China with 2-3€.
In 1-2 months from now on, no rush, after summer holiday, if I am not successful with NPCE985LA0DX, then I might reconsider the Pentium 987 motherboard or perhaps in mean time I can find a cheaper working motherboard with i5-3337U.
I think is time to close the present question, because my question was answered: the NPCE985LA0DX chip is non-programmable, it can be just replaced with a new one.

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