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Nexus 5 won't boot, 8 blinks

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By nitonreu, Junior Member on 26th October 2019, 04:06 PM
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I have never had any problem with my Nexus 5. It is now my standby device. Accordingly it doesn't get used much. One day I left it ON and didn't use it for 2 weeks. When I picked it up again it was OFF and didn't want to turn on. Naturally I thought the battery had drained and put it to charge.

Instead of the battery symbol on the screen (indicating it is being charged), I get a sequence of 8 red blinks on the bottom notification light (which is just above the charging port), each blink lasting 0.5 seconds, then 0.5 seconds off (so total duration of blinking sequence is 8 seconds), then 1.5 seconds off, then blinking sequence starts again.

I left it connected to the charger for 2 weeks. Nothing changed.
I then replaced the battery with a brand new OEM battery, same thing again.
I cannot get into recovery mode nor is the phone recognised when I connect it to the PC.

Any ideas? Anyone knows the meaning of this blinking sequence?
26th October 2019, 06:30 PM |#2  
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Quote:
Originally Posted by nitonreu

I have never had any problem with my Nexus 5. It is now my standby device. Accordingly it doesn't get used much. One day I left it ON and didn't use it for 2 weeks. When I picked it up again it was OFF and didn't want to turn on. Naturally I thought the battery had drained and put it to charge.

Instead of the battery symbol on the screen (indicating it is being charged), I get a sequence of 8 red blinks on the bottom notification light (which is just above the charging port), each blink lasting 0.5 seconds, then 0.5 seconds off (so total duration of blinking sequence is 8 seconds), then 1.5 seconds off, then blinking sequence starts again.

I left it connected to the charger for 2 weeks. Nothing changed.
I then replaced the battery with a brand new OEM battery, same thing again.
I cannot get into recovery mode nor is the phone recognised when I connect it to the PC.

Any ideas? Anyone knows the meaning of this blinking sequence?

what is the current state of the phone? do you just get the blinking when charge cable connected? no boot loop ?
26th October 2019, 07:21 PM |#3  
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So currently the phone doesn't switch on and cannot be charged it would seem.

There is no bootloop.

And yes, the blinking only goes on whilst a charging lead is connected or whilst it's on a wireless charging cradle. No blinking when removed from the charger.
26th October 2019, 08:28 PM |#4  
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Quote:
Originally Posted by nitonreu

So currently the phone doesn't switch on and cannot be charged it would seem.

There is no bootloop.

And yes, the blinking only goes on whilst a charging lead is connected or whilst it's on a wireless charging cradle. No blinking when removed from the charger.

you said you replaced the battery , I would check that connection , try removing the battery if possible and reconnecting it. Try the old battery too if you still have .

In my experience i'v seen that blinking light in other devices when they overheat.
26th October 2019, 08:46 PM |#5  
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I only replaced the battery because of the blinking problem as I suspected a deep discharged battery. Anyway the connections are good. 100%.

I never had overheat issues on my N5 as it was just used for basic functions, no gaming etc. I wouldn't imagine the device had overheated while it was left unattended on my desk, and there definitely is no overheating happening now as it doesn't even switch on...
26th October 2019, 09:30 PM |#6  
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Quote:
Originally Posted by nitonreu

I only replaced the battery because of the blinking problem as I suspected a deep discharged battery. Anyway the connections are good. 100%.

I never had overheat issues on my N5 as it was just used for basic functions, no gaming etc. I wouldn't imagine the device had overheated while it was left unattended on my desk, and there definitely is no overheating happening now as it doesn't even switch on...

sounds like your hammerhead finally checked out ... the old saying goes " if you don't use it, you lose it " .... try all combinations like hold power and volume down at the same time for 10 seconds , power and volume up ..etc

other than that i'd take a multi meter and make absolute sure you have power to the motherboard , then if you still do, it could be a short ..

if you want to go even further, a complete tear down of the phone, check for corrosion ( whitish residue on terminals and motherboard ) clean off with toothbrush only ( no water or liquid of any kind ) be careful removing ribbon cables and re-inserting them ... you can find lots of stuff on youtube for that.

good luck
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