CAT S61 only shows low battery screen upon start
I bought a used and defective Cat S61 thinking I could repair it. The problem: When starting the phone it shows the Android/Cat logo and shortly afterwards a battery low screen (low empty battery symbol that is crossed out). When connecting a cable it does the same in a loop (starting, Cat logo, battery low, turning off, starting again, …)
What I already tried/found out:
- The battery seems to be charged, it has 3.82 V.
- The battery has 4 pins, the two non-supply pins seem to have no electrical connection (Megaohms resistance) to each other, so it doesn’t seem to be a thermistor (or a broken one). I suppose it’s more likely the battery has an internal protection circuit and this is a communication port.
- I can’t even get into recovery, it immediately goes to the battery low screen and turns off. Hard reset is impossible.
- Charging port looks good
- Running the phone via cable and without battery does not work. It very shortly turns on the screen and immediately turns off again.
Since replacement batteries are a bit expensive for this phone I’m wondering if replacing the battery could likely fix this or if the battery is okay and the problem lies with the phone (meaning I likely can’t fix it).
Anyone had a similar problem? Anything else I could try?
Edit 1 week later: Directly supplying the phone battery plugs with power from a lab supply did not work. Charging the battery outside of the phone worked but didn’t help with the issue. A new battery did not fix the issue.
Edit 2: I found someone else who bought the phone from me and promised to tell me the fix in case they successfully repair it.
In case they tell me I will post the answer here.
Cette question est-elle utile ?