Seat ECU PCB Leaking?

hortonds · 3rd February 2019, 23:58

Okay, since my ECU gave up the ghost I thought I'd open it up to spot if there is anything obvious going on (blown capacitor etc). First thing I noticed is that someone had written "Rover 75" on it, so I'm guessing it is a replacement one from a scrappy before I got the car.

On opening it, it looked as if the main chip has leaked over everything.
In my years of working with computers I've never seen this. Blown CPUs usually have burn marks but never seen leaking ones.

Since this I've seen two others with exactly the same type of leaking. Which got me thinking that maybe it's a varnish of some kind? If it is, then it's not uniform, i.e slightly different colours and different pattern, just seems very weird.

Also, if this IS the problem, I'm guessing that it's a design fault, is there a newer, nicer, longer lasting alternative?

https://photos.app.goo.gl/UA5iFMmBw1xC55Au9

Phil-T4 · 4th February 2019, 05:27

Its a "PCB lacquer" David.

hortonds · 4th February 2019, 11:04

Quote:

Originally Posted by Phil-T4

Its a "PCB lacquer" David.

Thanks Phil,
It's very weird that they only put it on a few bits though

But hey, at least it means that my second hand one is possibly gonna work this time

3rd February 2019, 23:58	#1
hortonds Avid contributor Rover 75 CDTI Tourer Automatic Join Date: Mar 2015 Location: Dunstable Posts: 196 Thanks: 4 Thanked 31 Times in 22 Posts	Seat ECU PCB Leaking? Okay, since my ECU gave up the ghost I thought I'd open it up to spot if there is anything obvious going on (blown capacitor etc). First thing I noticed is that someone had written "Rover 75" on it, so I'm guessing it is a replacement one from a scrappy before I got the car. On opening it, it looked as if the main chip has leaked over everything. In my years of working with computers I've never seen this. Blown CPUs usually have burn marks but never seen leaking ones. Since this I've seen two others with exactly the same type of leaking. Which got me thinking that maybe it's a varnish of some kind? If it is, then it's not uniform, i.e slightly different colours and different pattern, just seems very weird. Also, if this IS the problem, I'm guessing that it's a design fault, is there a newer, nicer, longer lasting alternative? https://photos.app.goo.gl/UA5iFMmBw1xC55Au9 __________________ 300,000 miles and back on the road Jobs done: Everything you can possibly imagine ... I have the "Triggers Broom" of cars.

4th February 2019, 05:27	#2
Phil-T4 I really should get out more....... MG ZT-T, Rover 75 Tourer Join Date: Mar 2011 Location: Olney Posts: 2,969 Thanks: 245 Thanked 1,088 Times in 657 Posts	Its a "PCB lacquer" David.