buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Pi4 GPIO header disaster

Thu Jul 11, 2019 8:47 pm

So i hope i this is just a fluke, and this is not a complaint rather an inquiry if this is as unusual as i hope it is. And i hope this is the right place to post this.

I just bought 2* Pi4B 2GB and tried to connect the POE hat (which i've done hundreds of times without exaggeration) and realised the GPIO pins were not properly aligned, i assumed i somehow caused it and went for the other pi and looked at the pins carefully. Turns out they are all slightly misaligned, but only a fraction of a millimeter, easier to feel with a finger then see with my eyes.

A normal header slips on after some light finessing, but the POE hat has a flatter design and less of a "funnel" for the pins which makes the placement of the pins more important. I spent a good 45 minutes on it, carefully trying to straighten pins, wrecked one pi completely and only just managed to get a poe hat on the other, at the cost of one loose GPIO pin that was pushed out the backside of the Pi. Just to be sure i tested it on a couple of old pies and the hat went on without problem.
Two weeks ago i spent a day putting together 130 pcs of Pi3B+ + POE cards without losses so even if the above makes me sound like a butterfingered oaf i assure you that is not the case here, this is first time i've ever managed to wreck a pi, which a testament to the extreme build quality since i've done some realy unfriendly stuff to some of them :D.
Both pies in their original box, unopened and no marks or scratches on them, bought in a store so not a case of abuse in transport.

Has anyone else experienced this or similar with a Pi4 + POE hat? im hoping some machine just had a bad day because boy om loving this update.

User avatar
neilgl
Posts: 1197
Joined: Sun Jan 26, 2014 8:36 pm
Location: Near Aston Martin factory

Re: Pi4 GPIO header disaster

Thu Jul 11, 2019 9:10 pm

Can you post some photos of it

User avatar
Imperf3kt
Posts: 2986
Joined: Tue Jun 20, 2017 12:16 am
Location: Australia

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 9:50 am

I've just put some stand-off's on my Pi4b and noticed they were crooked and upon loosening them I discovered they're very loose fitting, able to move by up to a mm.

Are you using stand-offs? Are they screwed in correctly?
55:55:44:44:4C
52:4C:52:42:41

User avatar
mahjongg
Forum Moderator
Forum Moderator
Posts: 12416
Joined: Sun Mar 11, 2012 12:19 am
Location: South Holland, The Netherlands

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 11:10 am

Asked jamesh to have a look at this thread.

buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 12:51 pm

I reluctantly pryed of the POE hat which took some mild violence. Its possible that i bent the two pins closest to the eth port in the process. Also this is after the most crooked ones were straightened, they were all slightly misaligned so the problem was less obvious to the eye out of the box, but completely impossible to get the hat mounted on. Although they look like a nightmare its now possible to get the hat on with some finessing.

This angle shows it clear as day, looks less crooked in reality ( i don't wear glasses and have 20/20 vision)
pin1.JPG
pin1.JPG (27.19 KiB) Viewed 1412 times
Pi 4B, everything looks normal from this angle
pin3.JPG
pin3.JPG (177.79 KiB) Viewed 1412 times

pin4.JPG
pin4.JPG (77.94 KiB) Viewed 1412 times

buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 12:54 pm

Imperf3kt wrote:
Fri Jul 12, 2019 9:50 am
I've just put some stand-off's on my Pi4b and noticed they were crooked and upon loosening them I discovered they're very loose fitting, able to move by up to a mm.

Are you using stand-offs? Are they screwed in correctly?
No stand-offs, no case.
Would be impossible to get the hat on with standoffs since i have to wiggle it to get the pins in.

jdb
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 2164
Joined: Thu Jul 11, 2013 2:37 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 12:55 pm

Can you post a close up macro shot of the GPIO connector plastic surrounding the pins and the underside of the Pi? Don't upload the image to the forum, use imgur or similar for a full-resolution image.
Rockets are loud.
https://astro-pi.org

buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 1:24 pm

jdb wrote:
Fri Jul 12, 2019 12:55 pm
Can you post a close up macro shot of the GPIO connector plastic surrounding the pins and the underside of the Pi? Don't upload the image to the forum, use imgur or similar for a full-resolution image.
Something like this?
https://imgur.com/a/nkxPTeF

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 24192
Joined: Sat Jul 30, 2011 7:41 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 1:36 pm

Can you post a picture of the little QR code on the board please. Also, where did you get the device from, and have you ever done any soldering on it?
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed. Here's an example...
“I think it’s wrong that only one company makes the game Monopoly.” – Steven Wright

buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 1:50 pm

jamesh wrote:
Fri Jul 12, 2019 1:36 pm
Can you post a picture of the little QR code on the board please. Also, where did you get the device from, and have you ever done any soldering on it?
https://imgur.com/a/nOneuAH

Bought of-shelf from a swedish electronics store called netonnet.se yesterday at about 17:00, no soldering or tampering of any kind.
It has been exposed to light swearing over the fact that i forgot to buy a mini-hdmi converter but that's it.

User avatar
PeterO
Posts: 5164
Joined: Sun Jul 22, 2012 4:14 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 1:59 pm

There are some really poor looking solder joints in those pictures. :( Is there a QA problem ?
PeterO
Discoverer of the PI2 XENON DEATH FLASH!
Interests: C,Python,PIC,Electronics,Ham Radio (G0DZB),1960s British Computers.
"The primary requirement (as we've always seen in your examples) is that the code is readable. " Dougie Lawson

jdb
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 2164
Joined: Thu Jul 11, 2013 2:37 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 2:00 pm

There's no way that those joints came out of the solder wave machine like that. At some point in its life, it has seen the pointy end of a soldering iron.
Rockets are loud.
https://astro-pi.org

buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 2:02 pm

jamesh wrote:
Fri Jul 12, 2019 1:36 pm
Can you post a picture of the little QR code on the board please. Also, where did you get the device from, and have you ever done any soldering on it?
I know very little about circuit boards, but this looks pretty shoddy compared to the B3+ Pis. Although that might be all looks and unimportant. The thing works perfectly and have no heat issues etc.
https://imgur.com/a/Ai6oWhk

buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 2:06 pm

jdb wrote:
Fri Jul 12, 2019 2:00 pm
There's no way that those joints came out of the solder wave machine like that. At some point in its life, it has seen the pointy end of a soldering iron.
Uh, ok. the box was untouched and i opened it from the side. I have the box with the paperwork in front of me, probably the receipt somewhere as well. What ever happened to it was in manufacturing.

echmain
Posts: 252
Joined: Fri Mar 04, 2016 8:26 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 2:11 pm

jdb wrote:
Fri Jul 12, 2019 2:00 pm
There's no way that those joints came out of the solder wave machine like that. At some point in its life, it has seen the pointy end of a soldering iron.

You're supposed to use the pointy end?!? D'oh!

buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 2:16 pm

And I had two of these... The realy bad one went with with the recycling early this morning after basically falling apart in my hands.

Just out of curiosity i've asked a friend to pick up another one from the same shop and i'll have it here in an hour or so.

jdb
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 2164
Joined: Thu Jul 11, 2013 2:37 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 2:23 pm

We're going to need pictures of the connectors and barcodes of every Pi that you've received that exhibits bent pins/bad soldering.
Rockets are loud.
https://astro-pi.org

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 24192
Joined: Sat Jul 30, 2011 7:41 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 2:39 pm

Can you contact me via [email protected], FAO James Hughes, to arrange sending the defective device (we would have liked both of them if you can still retrieve it) back to us. I'll send you a replacement + goodies by return.

Thanks.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed. Here's an example...
“I think it’s wrong that only one company makes the game Monopoly.” – Steven Wright

buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 3:29 pm

buling wrote:
Fri Jul 12, 2019 2:16 pm
And I had two of these... The realy bad one went with with the recycling early this morning after basically falling apart in my hands.

Just out of curiosity i've asked a friend to pick up another one from the same shop and i'll have it here in an hour or so.
Just received the extra one and this one is good. Soldering and all looks great.

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 24192
Joined: Sat Jul 30, 2011 7:41 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 3:38 pm

buling wrote:
Fri Jul 12, 2019 3:29 pm
buling wrote:
Fri Jul 12, 2019 2:16 pm
And I had two of these... The realy bad one went with with the recycling early this morning after basically falling apart in my hands.

Just out of curiosity i've asked a friend to pick up another one from the same shop and i'll have it here in an hour or so.
Just received the extra one and this one is good. Soldering and all looks great.
We would still like the dodgy one back please.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed. Here's an example...
“I think it’s wrong that only one company makes the game Monopoly.” – Steven Wright

buling
Posts: 18
Joined: Thu Oct 04, 2012 7:11 am

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 3:41 pm

jamesh wrote:
Fri Jul 12, 2019 3:38 pm
buling wrote:
Fri Jul 12, 2019 3:29 pm
buling wrote:
Fri Jul 12, 2019 2:16 pm
And I had two of these... The realy bad one went with with the recycling early this morning after basically falling apart in my hands.

Just out of curiosity i've asked a friend to pick up another one from the same shop and i'll have it here in an hour or so.
Just received the extra one and this one is good. Soldering and all looks great.
We would still like the dodgy one back please.
NP, email sent.

User avatar
hardwaremack-orginal
Posts: 55
Joined: Fri Jun 28, 2019 7:52 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 5:10 pm

it looks to me like some how you ended up with a test or development unit .... something like that...
for me this would not be an issue... i would have fired up my s-993a, desoldered anything that needed it... resoldred.... and installed a new header, i have a whole bag.

alphanumeric
Posts: 2181
Joined: Tue Jan 19, 2016 2:17 pm
Location: Sydney, Nova Scotia, Canada

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 8:24 pm

To me it looks like somebody took a heat gun to it? Maybe trying to remove the GPIO header to swap gender or something/

User avatar
PeterO
Posts: 5164
Joined: Sun Jul 22, 2012 4:14 pm

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 8:48 pm

alphanumeric wrote:
Fri Jul 12, 2019 8:24 pm
To me it looks like somebody took a heat gun to it? Maybe trying to remove the GPIO header to swap gender or something/
The pin that fell out looks like it's never been properly soldered so did it come out of the factory like that ?
PeterO
Discoverer of the PI2 XENON DEATH FLASH!
Interests: C,Python,PIC,Electronics,Ham Radio (G0DZB),1960s British Computers.
"The primary requirement (as we've always seen in your examples) is that the code is readable. " Dougie Lawson

alphanumeric
Posts: 2181
Joined: Tue Jan 19, 2016 2:17 pm
Location: Sydney, Nova Scotia, Canada

Re: Pi4 GPIO header disaster

Fri Jul 12, 2019 8:53 pm

PeterO wrote:
Fri Jul 12, 2019 8:48 pm
alphanumeric wrote:
Fri Jul 12, 2019 8:24 pm
To me it looks like somebody took a heat gun to it? Maybe trying to remove the GPIO header to swap gender or something/
The pin that fell out looks like it's never been properly soldered so did it come out of the factory like that ?
PeterO
There are a bunch of cold soldered pins. And the black plastic part of the header looks heat damaged to me. I'd be very surprised if it ever left the factory like that? One look during QA should tell you something went wrong.

Return to “General discussion”