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Search: Posts Made By: reformatt
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 05:45 PM
Replies: 3
Views: 82
Posted By reformatt
Re: Capacitor values in boardview

Have you noticed that only one side of this board has no values listed? It's possible that the boardview doesn't have these values, or it could be the way openboardview interprets the FZ file format....
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 04:14 PM
Replies: 3
Views: 72
Posted By reformatt
Re: DELL VOSTRO 14 - LA-D822P Rev: 1.0

Check CMOS battery voltage. Does laptop start after a CMOS reset? Usually I'd try replacing the BIOS EEPROM (W25Q128FVSIQ) on spec. Normally when they're defective, they won't erase properly or you...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-23-2022, 09:16 PM
Replies: 14
Views: 406
Posted By reformatt
Re: Why does PCH get shorted internally?

CPU/PCH are only made for 24 months tops for each generation. Most of the ones you see available online are pulled from old boards. Who knows if they work or not. If they don't, the vendor will blame...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-20-2022, 01:32 AM
Replies: 5
Views: 1,224
Posted By reformatt
Re: 820-00138-A Q7706 PPBUS_G3H Short

Just received one of these today with dead short across PPBUS_G3H. No prizes for guessing where the source of that one was.

U7310 was short, and so was the CPU; confirmed with voltage injection...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-18-2022, 07:54 PM
Replies: 1
Views: 103
Posted By reformatt
Bioscreator

I came across this utility called Bioscreator. A lot of the things it does can be done manually with tools like FIT and a hex editor. But I've seen no reference to this anywhere, and he want's $100...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-17-2022, 06:48 AM
Replies: 28
Views: 347
Posted By reformatt
Re: MacBook Pro A1278 - No charger light, no PPBUS_G3H, SMC_BC_ACOK short when powere

My regular programmer is a SVOD3 but it's a bit expensive if you aren't doing EC programming. I also have a T56 for some of the other stuff, but the interface is a bit convoluted compared to the...
Forum: BIOS Requests ONLY! 05-17-2022, 05:05 AM
Replies: 18
Views: 2,637
Posted By reformatt
Re: Lenovo LEGION Y530-15ICH (NM-B701) need EC and BIOS files

Confirmed its a flexion problem. Put bare board on the bench, no CMOS or regular battery. Soon as power is applied it goes through normal CMOS reset procedure and I get normal Vcore voltages around...
Forum: BIOS Requests ONLY! 05-17-2022, 02:36 AM
Replies: 18
Views: 2,637
Posted By reformatt
Re: Lenovo LEGION Y530-15ICH (NM-B701) need EC and BIOS files

I tried post 10 BIOS, with appropriate editing. Serial number all correct etc, however fault remains. I noticed that when I open the lid the whole centre of the laptop bends in the middle. So I'm...
Forum: BIOS Requests ONLY! 05-17-2022, 01:56 AM
Replies: 18
Views: 2,637
Posted By reformatt
Re: Lenovo LEGION Y530-15ICH (NM-B701) need EC and BIOS files

I did try the BIOS from post 10. It initially did appear to work when I tested with the heatsink off and I plugged it in (fans were running flat out so didn't want to leave it too long at that...
Forum: BIOS Requests ONLY! 05-16-2022, 08:12 PM
Replies: 18
Views: 2,637
Posted By reformatt
Re: Lenovo LEGION Y530-15ICH (NM-B701) need EC and BIOS files

Machine came in today which works fine on battery, but screen shuts off as soon as power is plugged in.

Weird thing is that it will charge the battery just fine. All the power supplies etc remain...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-16-2022, 04:47 PM
Replies: 28
Views: 347
Posted By reformatt
Re: MacBook Pro A1278 - No charger light, no PPBUS_G3H, SMC_BC_ACOK short when powere

You previously mentioned broken pin on RAM slot and you've also replaced the SMC. Are you sure the SMC you used is any good? Maybe reball the old one and put it back on. Review and triple check all...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-16-2022, 07:38 AM
Replies: 28
Views: 347
Posted By reformatt
Re: MacBook Pro A1278 - No charger light, no PPBUS_G3H, SMC_BC_ACOK short when powere

CHGR_ACOK is open drain output so is being pulled low by the ISL because of the bad input to pin 2. It is irrelevant till you sort that out. You may have introduced other issues though from component...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-16-2022, 07:07 AM
Replies: 28
Views: 347
Posted By reformatt
Re: MacBook Pro A1278 - No charger light, no PPBUS_G3H, SMC_BC_ACOK short when powere

Not sure what your logic is re DC IN board since there is a diode in between, but R7005 is clearly faulty.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-16-2022, 04:40 AM
Replies: 7
Views: 298
Posted By reformatt
Re: Dell Inspiron 7520 (Intel/AMD) LA-8241P Freezing Issue

The GPU's from this era fail because of bad connections from the die to the BGA pads underneath. It's only a temporary fix unfortunately.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-16-2022, 12:32 AM
Replies: 28
Views: 347
Posted By reformatt
Re: MacBook Pro A1278 - No charger light, no PPBUS_G3H, SMC_BC_ACOK short when powere

So if the output of D7005 is ok, that means from your earlier statements you have a 14V drop across R7005? Check R7005 resistance and resistance to ground from pin 2 of the ISL.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-15-2022, 09:32 PM
Replies: 28
Views: 347
Posted By reformatt
Re: MacBook Pro A1278 - No charger light, no PPBUS_G3H, SMC_BC_ACOK short when powere

Check D7005.

Don't replace components en masse unless you have a valid reason. This is a good way to introduce additional faults and then it makes it difficult to help.

All troubleshooting...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-15-2022, 06:14 PM
Replies: 28
Views: 347
Posted By reformatt
Re: MacBook Pro A1278 - No charger light, no PPBUS_G3H, SMC_BC_ACOK short when powere

CHGR_ACOK is open drain on ISL chip. Should be pulled high to PP3V3_S5_SMC by a pullup. This comes from the ISL......PPBUS_G3H is 12.3V, this indicates to me that the SMC isn't communicating to the...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-12-2022, 05:47 PM
Replies: 2
Views: 167
Posted By reformatt
Re: Medion Akoya MD98920 P7624 No CPU and GPU Voltages

Go through each power supply controller, check for power good signals on each using datasheets. I had a memory controller once producing the right voltage, but no power good signal as the chip was...
Forum: Schematic Requests ONLY! 05-12-2022, 01:58 AM
Replies: 1
Views: 73
Posted By reformatt
Re: Slinky 17893-1 Schematic needed

Ok didn't end up needing the schematic as I fixed it already. I've had this model come across a few times on my bench so I'll upload it here if I have to buy it down the track.

For the record,...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-12-2022, 12:05 AM
Replies: 5
Views: 235
Posted By reformatt
Re: macbook a1286 820-2915-b not turning on

The 820-3115 board has a numbered power sequence. Basically the same for this board so use that to troubleshoot. If you not getting to PM_SLP_S4 there can be many reasons for it.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-12-2022, 12:04 AM
Replies: 4
Views: 295
Posted By reformatt
Re: Thinkpad L480 , Short To Ground, CPU gets Hot

Although initially expensive, a thermal camera will save you countless hours of time. Can't put a price on that.
Forum: Schematic Requests ONLY! 05-11-2022, 07:47 PM
Replies: 1
Views: 73
Posted By reformatt
Slinky 17893-1 Schematic needed

From an Acer Sp314-51. Motherboard is a Wistron Slinky 17893-1.

Schematic/boardview is on a few paid sites, just seeing if anyone has it before I shell out.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-11-2022, 06:36 AM
Replies: 4
Views: 134
Posted By reformatt
Re: Mac book Mac 1534 screen

Look for a defective one on eBay with a shorted CPU and steal the screen off it.

The vendors on Aliexpress will send you a pictures of the screen under test prior to shipping. Despite that, I've...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-08-2022, 09:51 PM
Replies: 15
Views: 557
Posted By reformatt
Re: No Trackpad a1278

I meant OPTION on boot. It's all easily circumvented by dumping the BIOS and editing it. Plenty of resources here on how to alter serial number, remove password, clean the ME etc. There are others...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 05-08-2022, 03:17 PM
Replies: 15
Views: 557
Posted By reformatt
Re: No Trackpad a1278

Find my MAC can become an issue if they've enabled lost mode. In that event, it will put a password on the EFI when it connects to the net. I'm not really sure about the status after removal, since I...
Showing results 1 to 25 of 311

 
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