Badcaps.net Forum
Go Back   Badcaps Forums > Search Forums
Register FAQ Calendar Search Today's Posts Mark Forums Read

Showing results 1 to 25 of 500
Search took 0.02 seconds.
Search: Posts Made By: mon2
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 11:58 AM
Replies: 1
Views: 10
Posted By mon2
Re: MacBook Pro A1990 No power

Remove all power. Meter in resistance mode.

Check the resistance to ground of PPBUS_G3H. A low resistance means someone is pulling this line down.

Is this rail pulsing normal to low to normal...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 10:56 AM
Replies: 3
Views: 30
Posted By mon2
Re: where to find a good supplier for smd parts

Try this store - the ratings and sales volume are high. It is faster to source from Amazon if the vendor has stock closer to you but sometimes, even the Amazon vendor is in China or elsewhere.
...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 10:48 AM
Replies: 10
Views: 143
Posted By mon2
Re: Lenovo ThinkPad L13 18834-1M strange fault

Review the details of PU401 = charger IC.

Where exactly are you measuring your battery voltage flow ?

Use only the names / labels from the schematic otherwise it is impossible to guess and...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 10:09 AM
Replies: 27
Views: 352
Posted By mon2
Re: IC Marking Codes and Datasheets #2

Post more details of other markings from your logic board.

What brand ? Model ? You will have other silk screens on the board. Perhaps a schematic is floating for your unit.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 09:57 AM
Replies: 8
Views: 70
Posted By mon2
Re: Bypass Sony SVE151E11M thermal protection? (schematics provided)

Wish to mention that the SHDN# pin is shared across the logic board.

From your reading of ~5 volts means that no one camped on this common signal line is requesting for a shut down.

The fault...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 09:53 AM
Replies: 3
Views: 30
Posted By mon2
Re: where to find a good supplier for smd parts

Aliexpress is great for the parts / LCD, etc. While we have had good luck with battery sourcing as well, shipping laws may delay or restrict the importing of batteries to your region (fire hazard)....
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 09:48 AM
Replies: 9
Views: 148
Posted By mon2
Re: Macbook 820-2849 c7404 - Capacitor Replacement

Good that the logic board is booting. Battery charging is another case.

Proceed carefully to review the charging issue.

See attached.

Measure and post the voltage reading of the battery...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 09:15 AM
Replies: 8
Views: 70
Posted By mon2
Re: Bypass Sony SVE151E11M thermal protection? (schematics provided)

The thermal sensor @ G717 needs to be powered. The power rail pin is Vcc.

This sensor can be powered by either 3v3 OR 5v0 - the decision is made by which 0 ohm resistor is assembled on the PCB. 0...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 09:08 AM
Replies: 2
Views: 25
Posted By mon2
Re: Dell Lattitude E7440 Run Slow

Watch this video - see if it helps.

https://youtu.be/00xRSqyGnks
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 08:38 AM
Replies: 38
Views: 968
Posted By mon2
Re: Asus FX504 not charging battery

Have you replaced mosfet PQ22 yet ? If not, do so.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 08:32 AM
Replies: 2
Views: 47
Posted By mon2
Re: Mbp a1990 emc 3215 820-01041-a

Why is the CPU very hot ? (other than it is a pig of a silicon design)

Do you have the proper heatsink and thermal compound onboard ? Be sure that the heatsink is firmly attached onto the top...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 08:24 AM
Replies: 8
Views: 70
Posted By mon2
Re: Bypass Sony SVE151E11M thermal protection? (schematics provided)

The label SHDN# has a the '#' as a suffix which denotes this signal to be active_low. That is, when this line is LOW, the shutdown event will occur.

If you are observing a logic high (5v in your...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 07:39 AM
Replies: 8
Views: 127
Posted By mon2
Re: Macbook A1932 Intermittent Backlight Issue 820-01521

See attached.

Check your trackpad. Remove it for testing. See if that allows for your display to function.

Check the voltage of IPD_LID_OPEN.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 07:35 AM
Replies: 10
Views: 143
Posted By mon2
Re: Lenovo ThinkPad L13 18834-1M strange fault

That is a short. Connect the 2 meter probes together when in resistance mode and you should see probably the same value.

What voltage do you see @ F4201 (fuse) - check both sides with the power...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 07:17 AM
Replies: 8
Views: 70
Posted By mon2
Re: Bypass Sony SVE151E11M thermal protection? (schematics provided)

What is the voltage of SHDN# when logic board is on?

This line, when logic low, will force a shutdown of the board.

Test it. Apply a ground pin to the same line and board should shut down.
...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 05:59 PM
Replies: 3
Views: 62
Posted By mon2
Re: A1502 Trackpad not working

Try a fresh keyboard and confirm diagnostics does not raise any errors.

Reference:
https://boards.rossmanngroup.com/threads/solved-820-3536-no-trackpad-or-mouse.23580/
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 05:49 PM
Replies: 1
Views: 54
Posted By mon2
Re: [Help] Dell Inspiron 15 ac adapter wattage no determined

Post or link the schematic if on this forum. Outside links are not allowed.

Dell uses an adapter_id pin that functions with a single wire interface (Maxim / Dallas semiconductor) to offer the...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 05:43 PM
Replies: 10
Views: 143
Posted By mon2
Re: Lenovo ThinkPad L13 18834-1M strange fault

Can you confirm the meter scale? The readings are higher than the meter scale as posted.

The ~100k ohms reading is considered low for the mosfet world.

Remove the 2nd mosfet (q4202) and see if...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 02:18 PM
Replies: 3
Views: 62
Posted By mon2
Re: A1502 Trackpad not working

See attached.

1) Review the interconnect cable for the trackpad.

2) review the pin pitch (spacing between each such pad) on the trackpad cable.

Be 100% sure if you are replacing this cable...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 12:14 PM
Replies: 4
Views: 57
Posted By mon2
Re: Lenovo Ideapad 510s-14isk won't boot

Remove the RAM and try again. Do you hear any POST beep code or see any different results now that the RAM is removed ?
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 12:02 PM
Replies: 38
Views: 968
Posted By mon2
Re: Asus FX504 not charging battery

BATPRES# will be ok with 0v but see attached.

Locate the small mosfet on BAT_PRS# line.

Do you have this circuit stuffed on your logic board ?

WITHOUT the battery, the mosfet (PQ88) should...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 09:56 AM
Replies: 8
Views: 127
Posted By mon2
Re: Macbook A2337 820-02016 Backlight Issue

Locate RR203 and review the voltage of this signal, RR203 (pin # 2) IPD_LID_OPEN_1V8.

What is the voltage with the LID OPEN ? with LID CLOSED ?

I believe that the LID sensors are commonly in...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 08:11 AM
Replies: 14
Views: 239
Posted By mon2
Re: Alienware 15 R3 Motherboard Issues Help Plz!

Locate the charger IC on the logic board.

Post the smd markings. Likely a part from TI (not the rapper) with BQ....

It should be near the dc adapter connector.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 07:41 AM
Replies: 4
Views: 100
Posted By mon2
Re: Apple iPad 10.2 (2019) - no power

Install iTunes on Windows.

Then connect and see if iTunes can detect this iPad.

Test with other cables. Inspect the lightning connector for damage / debris.

It is common to have this dock...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 02:11 AM
Replies: 38
Views: 968
Posted By mon2
Re: Asus FX504 not charging battery

PQ26 mosfet resistance looks low.

What is the voltage of BATPRES# pin 15 ?
Showing results 1 to 25 of 500

 
Forum Jump


Badcaps.net Technical Forums 2003 - 2022
Powered by vBulletin ®
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 12:05 PM.
Did you find this forum helpful?