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silver60618 started a topic What do color variations on SMD Capacitors mean?

in General Capacitor Questions & Issues

10-30-2024, 09:28 AM
What do color variations on SMD Capacitors mean?

Hi All, I am working on a motherboard, with 10uf caps in a series. One of them is blown. The spares I have are 10uf dark brown, and the original ones in the photo are light brown/tan.

#1 Does the cap color have any meaning? i.e. size 0603/0805, voltage, etc? is it ok if same value, different color? I only have the dark brown caps

#2 These caps look like they are in a series, is it necessary to swap all of them or just the bad one?

#3 Can any problems arise from using a higher rated uF capacitor? ie using 15uf instead of the 10uf?

Any help would...

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silver60618 started a topic TANTULUM CAPACITORS SHORT QUESTION ASUS GL504GS

in General Capacitor Questions & Issues

07-20-2024, 12:59 PM
TANTULUM CAPACITORS SHORT QUESTION ASUS GL504GS

Hi Im working on repairing this Asus GL504GS, and with meter in continuity mode, getting short to ground on all of these GPU related tantulum capacitors and .03ohm value in Diode mode (image with arrows). are these readings normal for this type of Board?

I tested the caps on another non working board, and get the same readings.

If abnormal, is it safe to inject 1v, 3-4amps to these to monitor with thermal cam?...

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silver60618 replied to Blown Inductor on WD My Passport

in Troubleshooting Laptops, Tablets, and Mobile Devices

04-05-2024, 11:23 AM
Thanks Mon! Searching for repacement was my next step, if I couldnt salvage something from the bone pile.

This is another board that matches part #, but looks like they changed the inductor type in fabrication...

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silver60618 started a topic Blown Inductor on WD My Passport

in Troubleshooting Laptops, Tablets, and Mobile Devices

04-05-2024, 09:54 AM
Blown Inductor on WD My Passport

Hi Guys, my WD My Passport drive powers on, then powers off. Ive taken out the motherboard and identified a blown Inductor. Im trying to recover my data only

Reading between leads show nothing. If I removed this Inductor, what would be a suitable replacement? am I correct that its a ferrite Inductor is to just filter noise?
Ive seen people just bridge them, any harm in replacing it with a differnt value Inductor?

Lastly am I correct in thinking there is no polarity on the smd component?

Thanks!...

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silver60618 replied to NEED MACBOOK LCD PINOUT (LCD SIDE)

in Troubleshooting Laptops, Tablets, and Mobile Devices

01-29-2024, 11:35 AM
Thanks Sir!...

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silver60618 started a topic NEED MACBOOK LCD PINOUT (LCD SIDE)

in Troubleshooting Laptops, Tablets, and Mobile Devices

01-29-2024, 10:51 AM
NEED MACBOOK LCD PINOUT (LCD SIDE)

Hi All does anyone have the pinout for LCD side cable connect on TCON board?
specifically for any of the macbook models [B]A1708 A1706 A1989 A2159 A2289 A2251 A2338 15" A1707 A1990 A2141

thanks![/B]

[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3206842}[/ATTACH]Hi All does anyone have the pinout for LCD side cable connect on TCON board?
specifically for any of the macbook models [B]A1708 A1706 A1989 A2159 A2289 A2251 A2338 15" A1707...

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silver60618 started a topic Can Anybody help me identify this IC marked MZ8b

in General Electronics Technical Discussion

01-05-2024, 06:04 PM
Can Anybody help me identify this IC marked MZ8b

Hi i need help identifying this IC marked MZ8b. its coming off the DC jack for a mini pc. is there any measurements I can take to help identify it? looked online, found nothing

Thanks!...

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Last edited by silver60618; 01-05-2024, 06:13 PM.
silver60618 started a topic Lightform LFC mini PC,Blown Component - Need help identifying or Next Steps

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

12-29-2023, 11:59 AM
Lightform LFC mini PC,Blown Component - Need help identifying or Next Steps

Hi gang, I have 2 of these Lightform LFC mini PC's, and both suffered a blown component near the 12V power input. Im assuming its a voltage regulator,
But Im unable to identify the component or its marking. (The best I can make out is M48i)

Can anyone help me clarify what this component maybe? or what would be the next troubleshooting or logical step to try next? Schematic is unavailable

I removed the IC for better clarity of traces...

5 Photos

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Last edited by SMDFlea; 12-29-2023, 12:13 PM.
silver60618 started a topic Determining dead CPU, Help with Voltage Injection

in Troubleshooting Laptops, Tablets, and Mobile Devices

10-13-2023, 05:32 PM
Determining dead CPU, Help with Voltage Injection

Hi Gang, I am trying to repair an Asus laptop motherboard with my basic knowledge. Laptop will not power on. I detected a short on the drain of 2nd Mosfet DC charging circuit and the current sense resistor.

I followed the power rail to the CPU/GPU. All inductors and nearby capacitors showing .02-.09 resistance/short.

I applied 2v, 3a to the current sense resistor and the only hotspot on thermal cam was the CPU .

Does this mean the CPU is dead? or am I missing a troubleshooting step?

any help would be appreciated!!...

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silver60618 replied to Acer Predator Helios 300 Laptop Bad MOSFET?

in Troubleshooting Laptops, Tablets, and Mobile Devices

12-21-2022, 12:54 PM
Re: Laptop Bad MOSFET?

Thanks again reformatt! I ordered the AON6500 Appreciate all your help! have a great holiday!

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silver60618 replied to Acer Predator Helios 300 Laptop Bad MOSFET?

in Troubleshooting Laptops, Tablets, and Mobile Devices

12-20-2022, 07:47 PM
Re: Laptop Bad MOSFET?

Thanks for the explanation. that makes sense. I wasnt able to find any online , digikey states its no longer manufactured, and the substitutes are lowerer amps 140ish

Is there any place else you can recommend I look? thanks a bunch!

[URL="https://www.digikey.com/en/products/detail/alpha-omega-semiconductor-inc/AON6406/10244078"]https://www.digikey.com/en/products/detail/alpha-omega-semiconductor-inc/AON6406/10244078[/URL]Re: Laptop Bad MOSFET?

Thanks for the explanation. that makes sense. I wasnt able

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silver60618 started a topic Acer Predator Helios 300 Laptop Bad MOSFET?

in Troubleshooting Laptops, Tablets, and Mobile Devices

12-20-2022, 04:35 PM
Acer Predator Helios 300 Laptop Bad MOSFET?

Hi Guys I have a laptop Acer Predator Helios 300, it had liquid spill, the laptop works, but does not charge battery.

Ive identified DC IN MOSFET has a short between Drain/Source. The Mosfet is BA8Y12 6406 (30v, Id=170 amps).

Can i replace this with a similar mosfet 6414A (30v Id=30amps)?

is that amp rating important in terms of variations?

thanks

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silver60618 replied to HELP Identifying a MOSFET L3 GUD

in Troubleshooting Laptops, Tablets, and Mobile Devices

09-07-2022, 09:38 AM
Re: HELP Identifying a MOSFET L3 GUD

Thanks Guys! I was able to replace the 2nd power mosfet that was shorted from a donor board and all is good now!

Cheers!

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silver60618 started a topic HELP Identifying a MOSFET L3 GUD

in Troubleshooting Laptops, Tablets, and Mobile Devices

08-31-2022, 03:35 PM
HELP Identifying a MOSFET L3 GUD

Hi Gang, Im working on an Acer Aspire 5, that wasnt charging or randomly not powering on. I identifyed a shorted MOSFET and removed it. Laptop now powers on with the Missing MOSFET.

Im having a devil of a time finding a replacement. the value of mosfet reads L3 GUD 4U0T01. I cannot find anything on this online

Is there a subsitute I can use? can I grab a similar sized one from a donor board of another brand?

Thanks!

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Last edited by SMDFlea; 09-01-2022, 04:34 AM. Reason: L3 GUD
silver60618 replied to New Members - please post your introductions here

in Announcements & Related News

08-31-2022, 03:12 PM
Re: New Members - please post your introductions here

Hey guys, long time reader first time poster. Computer tech looking to expand my knowledge and share my limited knowledge :o)

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