I just replaced the screen (cracked) and charging port (worn out) on my Mi Pad 4 Plus.
To do this I had to remove the battery and unfortunately one of the stretch glue strips snapped off. So I had to use a metal feeler gauge to get the adhesive off the underside on one side. I was careful and visually the battery looked fine on removal. I didn't damage the battery shell and it didn't bend/crease.
After fixing the screen I tested most of the functions before reassembling but forgot to test the camera.
After I put the case back on it had been working fine for several hours when I tried to open the camera app. The screen flickered and the tablet crashed.
It then just bootlooped and if I booted into TWRP the screen was flickering badly.
I noticed however that after a few minutes (plugged into the PC USB port) while in TWRP the screen stopped flickering.
I also noticed the battery level reported is now wildly erratic. It would show 6% in TWRP then rapidly charge upto 80%.
I took the battery out to inspect it and upon reinsertion it's showing 6%.
A genuine new battery is only $16 from AliE but I'm wondering if I'm likely just wasting money and the issue is somewhere else?
Related
Need advice Bad/fast. I'm on call at work and dropped phone about one storey and glass broke. I have a spare for for rooting with not sound.
replace screen using the thread here and a you tube video. All went smooth and booted with no screen issues. The issue is the battery bar shows a red "?" and won't charge. I had on charger all day in my work truck and was very slowly losing power. Then went to Bar for some Budweiser and went from around 65% to 0% in about 1 hr and not using /screen off.
check the battery connection make sure the screws are tight and the ribbon looks good.
Thanks for reply final sat down with good light and checked and looked good and tight.
just removed all screws and reset them all T5 blacks and jsut plugged into wall charger and about 3 minutes later it kicked on.
Oh and now getting a charge light.
Weird I'm a Service(Gas) station POS Tech "Point Of Sale" and as a rule. Start with the easy, obvious things first.
Slightly long post...
Skip to [Symptoms] if you want to get to the meat!
[Background]
I had a TF701 a while back. After using the HDMI connection in a hotel (I blame this!), the battery was dead in the morning, and the tablet would not boot or charge from the dock. It *would*, however, boot when plugged directly into the charger.
Out of warranty, I eventually scrapped it (wish I hadn't!) and replaced it with a new one...
Move on a year - I bought a second hand TF701 off eBay - this had a broken screen but otherwise worked fine (bit of a bargain!). One replacement screen later, I had a fully functioning TF701 to play with (which I rooted and rommed)...
The other day, the display stopped working (I'd carried it on my bicycle pannier - well padded - but I suspected vibration had done something). Back home it started working again, but the display was a bit intermittent, so I guessed that the connector cable had become unseated, so I opened her up again to take a look.
Sure enough, the ribbon was slightly out, so I straightened it, secured it properly and closed up the tablet while it booted.
Just as I snapped the last clip into place, the tablet instantly powered off and wouldn't boot.
[Symptoms]
Tablet will not boot on battery (plugging into the dock makes no difference)
Pressing/holding the power button results in two flashes of the orange power LED then nothing
Plugging the charging cable into the tablet allows you to boot normally
Unplugging the charging cable results in instant power down
Once booted (on external power), the tablet functions normally, but claims that the battery is at 0%, claims it is charging, but the battery doesn't actually charge at all.
The symptoms above were exactly what my 'scrapped' tablet did, so I thought this was yet another dead TF701. The difference, this time, was that it was working fine right up to the point where the last case clip was snapped into place. In other words, I seriously doubted that this was an electrical failure.
[Resolution]
I'm not entirely clear on what resulted in fixing the problem, but here is what I did:
disconnected the display and digitizer ribbon connectors
reconnected the display ribbon only (i.e. not the digitizer) and tested (no change)
disconnected the battery connection
measured the voltages on each of the pins on the battery connector (roughly 4v on the live pins)
cried inside a little
carefully reconnected the battery connection (firmly!)
reconnected the display and digitizer connections
tried powering her on again (expecting nothing) - she fired into life!
I let her boot up while the display panel was not clipped in place - just resting on the tablet. The TF701 booted up normally, and the battery display showed that there was about 87% charge!
This time I shut it down, clipped the casing back together, and powered it all up again - she lives!
So far, the tablet seems to be working normally, docking/undocking is fine and the battery charges normally.
I suspect that the two flashes of the power LED is some sort of diagnostics signal (may be as simple as 'no battery detected').
Bottom line is that if anyone else out there finds their tablet with the same symptoms, open her up and try re-seating the display ribbon connectors and the battery connection. There is hope!
I'm now wishing I hadn't been so quick to dispose of the first one that died. Oh well.
Hello
My screen cracked so I ordered a new on ebay. However after I have put the phone back in its shell the top part gets pretty hot. I opened it and started it without the aluminum shell to test and there were no heat? Anyone know what it might be?
Thanks In advance!
That isn't likely to be the screen. My phone gets warm too. About 4 days ago out of nowhere I noticed the upper part of the screen feeling warm, it turns out my phone had stopped sleeping properly and Google services had resumed chomping on my battery when the screen was off.
Tho when i don't keep it in the aluminium case it's not warm at all, turned on and I have logged on my simcard/wifi. I have left it on outside of the case for 1 hour and it don't get warm at all. However in the case it gets super hot as soon as it boots and then after 15-25m it turns off probably because it's too hot
Happened the same last night with me.
Put a download and slept, and in the morning it was all drained of battery and it showed that it shut down after minutes after I slept with 90%battery.
It was weird. Had to keep pressing power button for 40 sec approx for the phone to turn on.
It's working fine now though
did anyone of you even read my post? I said after a screenreplacement. It didn't just happened randomly. however i fixed it. I removed the camera and the earspeaker and reinstalled them used some alcohol on the contact points on the case and the earspeaker and it seemed to fix it if anyone has this problem later down the road
Hi jullleee, I have the same problem as u after I replaced the screen. The phone getting too hot on the top (one plus 3). On charge it becomes more hot and faster on very high temperature than without charging. Also the battery dont charge . Why did u reconnect the ear speaker and the camera ? Thank you in advance
DestinyisGone said:
Hi jullleee, I have the same problem as u after I replaced the screen. The phone getting too hot on the top (one plus 3). On charge it becomes more hot and faster on very high temperature than without charging. Also the battery dont charge . Why did u reconnect the ear speaker and the camera ? Thank you in advance
Click to expand...
Click to collapse
For anyone coming across this thread I just had the same problem when replacing my Oneplus 3 screen. It seemed to work, and I plugged it in, but it said "battery too low charge for a while", then I got the 0% and seemed to charge and then restart, and then be back at 0% and be stuck in this boot / charging loop. My battery had died hard when my screen died so I thought maybe it just needed to charge for a while, but the top half of the phone got very hot.
So I took it apart again and it turns out the issue for me was with the top ribbon cables that cross the battery. Where they connect to the main board was very tight and it was difficult to get both of them in place properly. Usually they kind of overlapped and one stuck up slightly. It was fixing their placement before bolting down their cover that fixed this issue for me.
Edit: Never mind. Still searching for my issue. Taking the back case off will let it work normally but whenever i snap it on it goes back into this charging loop, I still suspect it's an issue with these two cables and the case is putting pressure in the wrong spot or something but I'm not really sure yet.
I had the same problem, the issue was the fact that i plugged the ribbon cable the other way around.
Hello people,
I am trying to diagnose/save my old Nexus 5x.
It got soaked in strawberry juice a week ago. I wiped it off as much as I could, and left it. I did not test it, because the battery had run out days ago. After trying to charge it yesterday, I noticed it would not charge or turn on anymore.
In a rescue attempt, I opened up the phone (and was surprised how easy it was to get the bare pcb in my hand), and found a ****ton of gunk. The juice didn't only get in, the acid also did its work on the steel parts. I cleaned it as much as possible with a cleaning cloth, and finished with and electric toothbrush, to get the gunk out of all the nooks and crannies. It turned out quite clean again, although I cannot see if it also got under the main IC's.
Before the cleaning, I got my hopes up because I saw the gunk was mainly concentrated around the battery connector. I think the juice or corrosion shorter the battery terminals and depleted the battery. After cleaning it properly I measured only 0,8V.
To my surprise, after reassembly, the phone worked again. It started taking charge, and after a minute or 2, I could start it up. It worked as normal and it was taking on 1,5A of current. I left it like that for a while, and then I noticed it stopped charging at 50% charge. The voltage was 3.2v according to AccuBattery app, and the battery temperature 49C. The latter was odd, since the battery felt cool. Nowhere near 49C. So I'm also doubting the voltage value of 3.2v.
Anyway, the phone was still working at that point. It was just wouldn't go past 50% charge. I tried unplugging the charger (phone stayed on, so battery works at least a bit) and reconnecting. But it still wouldn't charge. After trying to reboot, it never came back to life since. Basically, when I plug in the charger, the red light starts flashing (and phone is drawing 700-800mA. After a couple seconds, the screen comes on, showing the battery icon. After that, the Google icon shows. And then it shuts down again. At that point, the current also drops to a stable 300mA @ 7,5v. It does not charge though. All the power seems to go into one of the main IC's (not the charging one), which is heating up noticeably in this state.
Can anyone tell me what could be happening? Why is the IC drawing that power while off and "charging"? Any tips? The faced the phone booted and worked for a while, gave me hope.
Edit: Now its drawing 650mA @ 7,5v after being plugged in instead of the previous 300mA.
Edit2: It's booting! Drawing 600mA @5v.now while phone is on, while idle and under load no change. I'll keep you posted. AccuBattery and android say it has 50% charge again, but shows a negative charging current.
My A51 fell into water. After i cleant it with 99% IPA, everything came back to life, except the screen.
The touch works, charging works... but the amoled remains black (even on bootup).
The only moment I saw something displayed on the screen is when I tried to power on the phone without the battery.
Of course it bootloops, but i can see a green tinted samsung logo for a quarter second (normally the screen remains completely black).
Here is the video of it : Video
This issue is very strange, I tried the screen with another motherboard (which also fell, but not in water), same result.
Anyone got ideas ?
Thanks
Hello blacktime2, your S10 once in the water you put it in rice for 24 hours then clean the usb-c port well. I think it still has humidity turn it off and put it in rice or with a hair dryer do not connect it to the mains especially not