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Search: Posts Made By: myth77
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 08-06-2022, 10:32 AM
Replies: 0
Views: 59
Posted By myth77
svidalert explanation

In my history of repairing laptops as a hobby i have found several boards that had either dead pch or ite or.... and after i replaced it i get to the point of having every single voltage except +vcc...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 08-06-2022, 10:06 AM
Replies: 1
Views: 72
Posted By myth77
A1369 and A1466 top case housing the same?

I didnt know where to ask (on what topic) but does anyone know can i use macbook air A1369 TOP CASE (with or without palmrest and keyboard) on A1466? they look the same but i am not sure. On...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-30-2022, 03:27 AM
Replies: 10
Views: 342
Posted By myth77
Re: asus gl502vsk no +vccore

Update, i found that on NPC81205 signals are on:

pin40 P_SVID_DATA_X1 is 1 vol,
pin 42 P_SVID_CLK_X1 also 1 vol,
but pin 41 P_SVID_ALERT#_X1 is 0,08 vol... i think this should be also 1 vol....
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-29-2022, 01:52 PM
Replies: 10
Views: 342
Posted By myth77
Re: asus gl502vsk no +vccore

I replaced pu8101, pu8102 and pu8100 but the same thing. But, then i read NCP81253 datasheet in details (link below) and according to the datasheet on page 9 for DRVH to go high i need to have EN and...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-19-2022, 11:21 AM
Replies: 1
Views: 185
Posted By myth77
macbook pro a2141 can not make recovery

So, i dont know almost anything on macs..but this is my nephews so i had to try. Its 16 inch macbook pro from 2019...It all started when he left something on the keyboard when closing the mac and...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-31-2022, 01:08 AM
Replies: 5
Views: 548
Posted By myth77
Re: Is this gpu or vram failure? Thx

for the future record it was one bad vram chip. I was also lucky...second one i replaced.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-26-2022, 04:05 AM
Replies: 10
Views: 342
Posted By myth77
Re: asus gl502vsk no +vccore

ok i will try and report...just to clarify we are talking about pu8101, pu8102 and pu8100(not pu8109)?
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-26-2022, 02:23 AM
Replies: 10
Views: 342
Posted By myth77
Re: asus gl502vsk no +vccore

i have...the readings on pins are:
pin 1 5V
pin 2 2V
pin 3 5V
pin 4 5v
pin 5 0v
pin 6 gnd 0v
pin 7 0 v
pin 8 0 v
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-25-2022, 01:09 PM
Replies: 10
Views: 342
Posted By myth77
asus gl502vsk no +vccore

This laptop i believe have all voltages...no short, but i can not get +vcccore to rise. On PWM CONTROLLER NCP81205 i have 5v, i have all_system_pwrgnd 3,3V but it is not opening +vcccore. The cpu...
Forum: BIOS Requests ONLY! 05-24-2022, 12:42 PM
Replies: 9
Views: 1,382
Posted By myth77
gl502vsk rev 2.1 clean ME

Please clean ME. THX
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-12-2022, 05:39 AM
Replies: 14
Views: 643
Posted By myth77
Re: Why does PCH get shorted internally?

I have also noticed the same..the most common is internal short...sometimes they even partially work..sometimes not....resistance arround 2,8 ohm on 3.3v rails.
I am not 100% sure...but i believe it...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-05-2022, 01:58 AM
Replies: 4
Views: 257
Posted By myth77
Re: Asus fx504g +vcc_core voltage

I would test PU5 resistence on all pins and compare it with PU4. Also i would test pq94,pq95 on all pins and compare it with pq97 or pq91.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-04-2022, 08:10 AM
Replies: 4
Views: 257
Posted By myth77
Re: Asus fx504g +vcc_core voltage

Did you check PU5 and PU6 and arround them?
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-27-2022, 04:14 AM
Replies: 0
Views: 164
Posted By myth77
Hp omen 17–an100 dag3bembcd0 chip identification

I received this laptop with misssing chips from the motherboard. They are for sure mosfet drivers but i am not sure which one..there is no schematic for this board. On similar board HP uses...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-15-2022, 01:01 AM
Replies: 5
Views: 365
Posted By myth77
Re: Asus GX701

as reformatt wrote...99% dead pch...1% that some capacitor in that area is dead. If you have power supply inject 1V on that coil and see whats get got.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-14-2022, 10:20 AM
Replies: 2
Views: 223
Posted By myth77
Replacing 2.5V 330U cap with 2.5V 390U cap?

Is it safe to replace 2.5V 330U cap with 2.5V 390U cap? This is on gpu power line on laptop. Thank you!
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-13-2022, 02:18 AM
Replies: 5
Views: 365
Posted By myth77
Re: Asus GX701

did you measure resistance on that coils near chipset? or caps on chipset?
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-01-2022, 04:08 AM
Replies: 3
Views: 227
Posted By myth77
Re: Asus N501JW - EC programming help request

On asus boards EC is programmed automatically on start but only if EC is empty/new. If you have used EC then you have to delete it first.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-28-2022, 04:04 AM
Replies: 1
Views: 436
Posted By myth77
UV solder mask - high temp resistent, recomendation?

Can someone recommend any good UV solder mask? But i need a solder mask that will stand high temperetures. The thing is...sometimes i have a bigger cooper ripped from the board, lets say mosfet...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-23-2022, 06:01 AM
Replies: 57
Views: 2,192
Posted By myth77
Re: ASUS ROG GA502D missing 19v

unfortunately there is no other way. Even if we found boardview for this motherboard it would be like a huge puzzle...you would had to remove/desolder joints and coils and resistors...to narrow...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-22-2022, 07:13 AM
Replies: 57
Views: 2,192
Posted By myth77
Re: ASUS ROG GA502D missing 19v

If it is exactly 0,1 ohm thats pure short to gnd...lets hope its capacitor...if its mosfet then with that low resistence it probably shorted cpu or gpu also.
If you have a power supply do what...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-21-2022, 04:01 AM
Replies: 57
Views: 2,192
Posted By myth77
Re: ASUS ROG GA502D missing 19v

as you can see you have a short on main power rail, short to gnd. Thats why your mosfet is not opening...to prevent damage to motherboard.
The problem is that main power rail is a huge...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-21-2022, 02:44 AM
Replies: 57
Views: 2,192
Posted By myth77
Re: ASUS ROG GA502D missing 19v

Did you check resistence to gnd on that blue parts? and short on mosfets?
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-15-2022, 02:26 AM
Replies: 31
Views: 2,610
Posted By myth77
Re: BGA reballing techniques and equipment

I have reballed several gtx 1070 and 1060 chips and didnt have any problem with warping...its just a quesiton of good stencil and patience with heating and airflow.

For chip that size i think you...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-14-2022, 08:25 AM
Replies: 31
Views: 2,610
Posted By myth77
Re: BGA reballing techniques and equipment

My suggestion is to use direct heat stencils. In my expirience the indirect method will work only with bigger bga lik gtx 1070 or so...but with pch you need to be very carefull to work with indirect...
Showing results 1 to 25 of 244

 
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