Samsung ATIV Tablet dead

[Lolomg07]

Hi so I have a Samsung ATIV 500T Tablet running Windows 8 and recently the power LED died which I traced back to a bad SMD resistor, unfortunately in the process of replacing this I shorted out a small SMD capacitor that was in parallel to this LED, I saw some smoke and the device shut off. The device would not power on so I removed the battery connector and after an hour the device powered on and was functioning as normal for about two weeks. After this I left the tablet unattended for about a week and I think the battery had completely died so I plugged it in and nothing. It was completely dead. I have attached some pictures of the motherboard. I tested every single SMD resistor on the board with a multimeter and they were all good. I'm thinking it's maybe a bad power IC? It has a WINBOND W25Q16BVSIG Bios chip I don't know if this is faulty or how to test it with a multimeter but I have a hot air rework station and I am capable of getting a preprogramed chip off ebay and soldering it on to the motherboard if necessary.

Please help. Thank you...

[Lolomg07]

Re: Samsung ATIV Tablet dead

Can someone tell me how I can test the bios IC ?

[vinceroger69]

Re: Samsung ATIV Tablet dead

So when you said (in the process of replacing this I shorted out a small SMD capacitor that was in parallel to this LED, I saw some smoke) Did you replace this capacitor? it mayhave something to do with the charging etc?

[Lolomg07]

Re: Samsung ATIV Tablet dead

So when you said (in the process of replacing this I shorted out a small SMD capacitor that was in parallel to this LED, I saw some smoke) Did you replace this capacitor? it mayhave something to do with the charging etc?

No this capacitor is just connected to the power LED.

[Lolomg07]

Re: Samsung ATIV Tablet dead

Can somebody please try to help me? I really need to get this working. Perhaps there's a power IC we can identify and try to test or replace.

Thanks

[Compute]

Re: Samsung ATIV Tablet dead

I understand very little English, write in plain words , what's the problem that I have translated through Google , I'll try to help as well as knowledge in electronics has

[Lolomg07]

Re: Samsung ATIV Tablet dead

I understand very little English, write in plain words , what's the problem that I have translated through Google , I'll try to help as well as knowledge in electronics has

OK

1. I tried to replace the resistor marked (1) in the picture and shorted out capacitor marked (2)

2. The device would not power on anymore since the battery completely lost charge

[Compute]

Re: Samsung ATIV Tablet dead

If the battery is completely discharged, it has a minimum acceptable level of charge, if the charge is less, the charge controller will not allow it charged, you need to try to charge the battery from an external power source.

[Lolomg07]

Re: Samsung ATIV Tablet dead

If the battery is completely discharged, it has a minimum acceptable level of charge, if the charge is less, the charge controller will not allow it charged, you need to try to charge the battery from an external power source.

When I shorted the capacitor as mentioned in the previous post I saw some smoke and the tablet died and would not power on. So I removed the battery connection it started working 30 mins later after plugging the battery back in.

Shouldn't the tablet power on without the battery connected? Just on AC power? Could it be a bad power IC?

[Compute]

Re: Samsung ATIV Tablet dead

What voltage of the battery now?
And give motherboard model tablet, maybe i have a schema/

[Lolomg07]

Re: Samsung ATIV Tablet dead

What voltage of the battery now?
And give motherboard model tablet, maybe i have a schema/

2 Volts and the motherboard model just says William Rev 1.0 It's a Samsung XE500T1C-HA1US

[Compute]

Re: Samsung ATIV Tablet dead

2 Volts

This is not enough , at a given voltage , charging will not turn on , the controller will not give

[Lolomg07]

Re: Samsung ATIV Tablet dead

This is not enough , at a given voltage , charging will not turn on , the controller will not give

So what should I do? can I charge the battery externally through a 5V USB cable?

[Compute]

Re: Samsung ATIV Tablet dead

Labratorny power supply is needed here
"5V USB cable" - kil battery

[Lolomg07]

Re: Samsung ATIV Tablet dead

Labratorny power supply is needed here
"5V USB cable" - kil battery

I don't have one.. any other option?

[Compute]

Re: Samsung ATIV Tablet dead

3 volts battery needed

[Lolomg07]

Re: Samsung ATIV Tablet dead

3 volts battery needed

This battery is rated at 7.5V though

[Compute]

Re: Samsung ATIV Tablet dead

It is clear now , but nevertheless I charge using laboratrny power supply, how to charge for another , there are options , but they are harmful to the battery

[Lolomg07]

Re: Samsung ATIV Tablet dead

It is clear now , but nevertheless I charge using laboratrny power supply, how to charge for another , there are options , but they are harmful to the battery

Ok so 3V is not enough? I can try to slowly charge the battery a little at least via USB whilst monitoring the voltage to get the tablet to recognize it

[Compute]

Re: Samsung ATIV Tablet dead

In general point is to charge the battery up to the level position , while it recognizes the tablet