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Case studies : It Is Not Always The Power Ic - Computers (10) - Nairaland

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Re: Case studies : It Is Not Always The Power Ic by Rdadi: 7:07pm On Jan 31
udemzyudex:


Did you reprogram the bios chip?

If you have a DC power supply, you can easily check if it detect ram or not.

The DC reading takes more amps when ram is inserted, so if reading stays the same with and without ram, then you can check ram slot voltages, and you know ram ic, depending on the type it uses whether PC3/pc3L etc uses different voltage and terminating voltage which goes to the ram slot, before you change the ram ic, I'll assume the ram coil was not getting the required voltage?
sent it to u so far what u hv stated might be the issue wasnt dunno if u still got anything... Acer and its wahala na 5&6 since u hvnt find anything yet i dont know any one can do that the board is not dead but it still doesnt bring up display 😩😩 now to buy such pc i need over 500k chaii
Re: Case studies : It Is Not Always The Power Ic by ryfoz(m): 6:25pm On Feb 02
udemzyudex:


...The best thing to do is negotiate, talk to 2 or more competent technician and see the one that will help you fix it at an affordable price, some technician also charge base on the model of your laptop.

I have a NEC laptop, waiting for this kind of repair, the guy who checked it says it's power IC, can you fix it? If I send you all the info?
Re: Case studies : It Is Not Always The Power Ic by udemzyudex(m): 9:45pm On Mar 09
Dell xps 15 with part number LA-E331P came in with no plug-in issue.
Dell have two type of charging issue.
1. The normal charging issue like every other laptop
2. The PS_ID issue,this is when the adapter watt can not be determine and when it's not shown you'll get the adapter watt= unknown at the battery section in bios setup.

This mobo was having the adapter watt unknown charging issue.
After checking I found out that the PR102 resistor was open, the value had increase to 1.5k ohms instead of 33ohm, the resistor was replaced with a 0ohm resistor and mobo works fine.
Battery charged from 85%-97%

Re: Case studies : It Is Not Always The Power Ic by udemzyudex(m): 9:54pm On Mar 09
La-9591p
Fault : Dead
The CD3301 ic got burnt and the mobo refuse to turn on, since this ic is kinda scarce, the best option is to bypass it.

Mobo turns on after bypassing.

Re: Case studies : It Is Not Always The Power Ic by Kustask: 6:48am On Mar 27
Dell precision 5510 won't start, just blink yellow and white light on the sensor light area, blank screen, it never fell, I updated my battery driver, then shut it down and then it refuses to turn on the next day ,

I have don't hard reset, removed battery, change battery, charger, nothing works
Re: Case studies : It Is Not Always The Power Ic by udemzyudex(m): 7:29am On Mar 27
Kustask:
Dell precision 5510 won't start, just blink yellow and white light on the sensor light area, blank screen, it never fell, I updated my battery driver, then shut it down and then it refuses to turn on the next day ,

I have don't hard reset, removed battery, change battery, charger, nothing works

If you're in lag you can bring it for checkup, you can reach me on 08064724259.
Re: Case studies : It Is Not Always The Power Ic by udemzyudex(m): 10:51pm On Mar 28
Part number : 13246-1
Fault : plug-in charging but not increasing.

Vin MOSFET impedance was fine both the charging and discharging MOSFET was OK.
ILIM and Iout pin and impedance was OK as well.
Communication between ACP/AC and Vin clr was OK.
There was no communication between SRP and battery clr was OK but there was no communication with SRN pin 12 of the bq25A charging ic.

After tracing, a missing track was found and connected, now mobo charges fine.

When there's no communication between SRP/SRN and clr there will be no charging since measures current between the charging ic and battery in the case of missing communication between ACP/AC you'll likely get a no power on (dead) laptop.

Re: Case studies : It Is Not Always The Power Ic by udemzyudex(m): 8:35pm On Apr 08
Model :820 g3
Fault : not charging.

Solution: ACP/AC not communicating with CLR, I use insulated wire to connect both lines and mobo works fine.

Re: Case studies : It Is Not Always The Power Ic by Trippledots(m): 8:46am On May 08
Ehimzy:


Can you direct me to any competent engineer

Direct?? Lolll...person say 15k for what others are calling 200k and you mind no tell you say na to send am to am sharp.

Abi you think he doesn't want more jobs. 😂
Re: Case studies : It Is Not Always The Power Ic by Trippledots(m): 8:55am On May 08
udemzyudex:
La-9591p
Fault : Dead
The CD3301 ic got burnt and the mobo refuse to turn on, since this ic is kinda scarce, the best option is to bypass it.

Mobo turns on after bypassing.
What's the disadvantages of bypassing the chip?
Re: Case studies : It Is Not Always The Power Ic by Ehimzy(m): 8:37pm On May 09
Trippledots:


Direct?? Lolll...person say 15k for what others are calling 200k and you mind no tell you say na to send am to am sharp.

Abi you think he doesn't want more jobs. 😂

He said 15k depending on the engineer.. That's why I asked him to direct me
Re: Case studies : It Is Not Always The Power Ic by udemzyudex(m): 10:22pm On Jun 19
Part number : 203032-2
Fault : no power

This HP pavilion 14 x360 came in with no power issue, the engr already tried to check what the issue is but couldn't get it, Mobo was completely dead.

I checked the impedance of the CRL resistor and notice there was a short to ground.
I checked the impedance of the tantalum G366 25V capacitor and it was short as well.
I remove the caps and short was gone, this is a common fault on this model.

Re: Case studies : It Is Not Always The Power Ic by udemzyudex(m): 10:48pm On Jun 19
Part number : dazhkdmb6e0
Fault : Not charging.

This is a simple fix if you know what you're doing, SRP pinn13 of BQ24737( charging ic) with the battery CLR.

The line was clear, no short and resistor on the line was not open, so the best thing is to run a jumper wire to the CLR.

After doing that, it was communicating and battery charge fine.

Re: Case studies : It Is Not Always The Power Ic by udemzyudex(m): 8:53am On Jun 26
Part number =X202E
Fault : no power

The Asus board was completely dead, impedance of all coils was fine, after connecting power 3.3v was OK but 5v coil was releasing 1.24v which was not proper.

You can easily detect fault like this if you have an oscilloscope,and from experience it usually the tantalum capacitor or the power ic itself.
I replaced the tantalum capacitor, 5v was back to the coil Mobo works fine.

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