This video isn’t going to win any awards. It’s only 13 seconds long, and is hyper-grainy. But if you peer closely, you can see my Nokia E72 displaying a bizarre kind of visual hiccups.
A brief bit of history: the E72 unfortunately became waterlogged. (Ahem. Old habits die hard.) I took out the battery immediately, and left everything to dry out in an airing cupboard. After putting the battery back in and restarting the E72, things initially looked fine. The device booted OK, and I could start navigating around the applications.
But about one minute after booting up, the display starts doing the kind of weird vertical jitter you can see in the video.
This display malfunction reminds me of my childhood days, when TVs would sometimes experience problems with their “vertical hold”. In that bygone era, there was usually a “vertical hold” button you could twiddle on the back of the set, to fix that problem. (Note to younger readers: this was before the advent of TV remote controllers.) However, although the E72 has lots of keys and buttons, none of them is labelled “vertical hold”.
It also reminds me of one more thing. This kind of vertical jitter is, sometimes, part of the normal display on my E72. But it usually only happens once at a time, rather than getting stuck in a loop.
Does anyone have any idea what causes this vertical jitter?
I’m hoping for a more precise answer than “water damage”. I think there must be at least some software aspect to it:
- The jittering doesn’t start immediately when the device boots, but only after a delay. It looks like it’s triggered by some of background software process, which eventually kicks in
- The speed of the jitter changes, depending on what else you do with the device. For example, if you start a new app, the jittering temporarily stops, but then restarts
- Whenever the jitter is occurring, the multi-coloured Nokia rotating “busy indicator” icon (I think that’s what it’s called) is just about visible on the title bar, suggesting that the device is trying to do something.
I wondered if there was anything in my own phone’s setup (e.g. the apps I had installed) that might, somehow, be causing this behaviour. So I went back to the factory settings. However, this didn’t cure the hiccups.
Almost certainly, I’m going to have to give up on using this particular device, but before I reach that outcome, I’m hoping to find a way to stop this behaviour!
In the meantime, I’ve been struggling to use an N900 as my primary smartphone. It’s an interesting experimental devices, but it’s miles away from being ready for main-time usage.
Added later: Thanks to @taike_hk for suggesting the use of a microscope, distilled water, alcohol, and a hairdrier. (But I don’t particularly relish the thought of disassembling my E72…)