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Search: Posts Made By: piernov
Forum: Troubleshooting Laptops, Portable, and Mobile Devices Yesterday, 09:01 AM
Replies: 12
Views: 167
Posted By piernov
Re: Samsung LA-8863P - EC not releasing SUSP#

SUSP# comes up after SLP_S3#.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices Yesterday, 04:31 AM
Replies: 8
Views: 160
Posted By piernov
Re: Alienware la-9332P - CPU Temp issue

CPU temp is measured by CPU itself. Sounds like heatsink issue indeed.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 03-03-2021, 12:05 PM
Replies: 13
Views: 441
Posted By piernov
Re: Asus Z87 Expert - No Power, LDO Regulator Gets Hot!

PCH die should not get warm when injecting on a 3.3V rail. No point in wasting time.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-03-2021, 10:05 AM
Replies: 2
Views: 57
Posted By piernov
Re: Shorted C3201 w/ R3032 on 820-00281

Well then that most likely killed U3200 without surprise, and could have also damaged U3100 and U3500.
Forum: BIOS Requests ONLY! 03-03-2021, 08:26 AM
Replies: 1
Views: 42
Posted By piernov
Re: HP Elitebook 8560p modding CPU support?

Ivy Bridge CPUs are not supported. Would require updating ME major version to 8, VBIOS, microcode and other modules, too much work and too difficult to do with little chance of success especially on...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-03-2021, 08:11 AM
Replies: 1
Views: 84
Posted By piernov
Forum: General Computer & Tech Discussion 03-03-2021, 07:56 AM
Replies: 6
Views: 336
Posted By piernov
Re: space for another DDR slot... put one there?

I wouldn't count on it working. In any case good luck cleaning the holes, never managed to do it. I'm still using my desktop board with 3 slots out of 4 since I couldn't get a new one in. (original...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-02-2021, 06:52 AM
Replies: 96
Views: 4,373
Posted By piernov
Re: X550jx black screen but cpu heating up

P_NVVDD_FBRTN_10 is connected to ground so "short to ground" is expected.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 03-02-2021, 06:44 AM
Replies: 2
Views: 64
Posted By piernov
Re: imac 21 2011 109-C29557-00 vga common issue

Did you confirm it is indeed caused by the graphics card?
https://logi.wiki/index.php/iMac_A1311/A1312_Graphics_card
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-02-2021, 02:55 AM
Replies: 11
Views: 343
Posted By piernov
Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

PP5V1_CHGR_VDD is created by the ISL6259 itself when it receives power on CHGR_DCIN.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-01-2021, 05:49 PM
Replies: 4
Views: 92
Posted By piernov
Re: A1990 lcd

Yes, should be good if it hasn't been badly "refurbished". Good OEM pulls are very hard to find. (except if you somehow have a machine you can pull it from of course)
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-01-2021, 04:28 PM
Replies: 10
Views: 217
Posted By piernov
Re: HP G6 R22 ,, AMD CPU ... Black Screen

Gonna be a dead AMD northbridge as usual.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-01-2021, 04:26 PM
Replies: 18
Views: 337
Posted By piernov
Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu

PM_BATLOW_L should go high if using a genuine Apple Magsafe2 60W. It needs to be a genuine Apple one, not a random eBay one, even with Apple logo, or a "refurbished" genuine one with a random cable,...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-01-2021, 04:24 PM
Replies: 4
Views: 92
Posted By piernov
Re: A1990 lcd

T2 is not an issue. The issue is that the market is filled with garbage low quality LCD assemblies for T2 machine so you'll have all sort of issues with no backlight, low brightness, no image, tint...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-01-2021, 04:19 AM
Replies: 18
Views: 337
Posted By piernov
Forum: BIOS Requests ONLY! 02-28-2021, 10:42 AM
Replies: 12
Views: 217
Posted By piernov
Re: Need Help A1286 2012 EMC 2556 bios password

If you don't select the correct chip in the programmer software it won't work.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 02-28-2021, 09:17 AM
Replies: 5
Views: 116
Posted By piernov
Re: iMac 2011 820-2828 - LED #1 lits for a second then goes off

100 ohms to ground on PP3V3_S5 is probably too low but check resistance to ground on every power rails as I already said, there may be a problem elsewhere.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 02-28-2021, 05:57 AM
Replies: 5
Views: 116
Posted By piernov
Re: iMac 2011 820-2828 - LED #1 lits for a second then goes off

The list of power rails is on page 6 "Power Alias", everything to the left of the '=' signs.
Page 98 doesn't matter, just some design rules for PCB routing.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 02-28-2021, 04:42 AM
Replies: 4
Views: 134
Posted By piernov
Re: 820-4924 no chime

Fan won't turn on until CPU gets burning hot (above 80C or something like that).

Backlight is present so most likely the machine is POSTing properly.

Chime can be restored with PRAM reset if...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 02-28-2021, 04:33 AM
Replies: 5
Views: 116
Posted By piernov
Re: iMac 2011 820-2828 - LED #1 lits for a second then goes off

There may be a short to ground on a secondary power rail causing the PSU to enter overcurrent protection.
Go through the list of power rails and measure resistance to ground for each.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 02-27-2021, 11:53 AM
Replies: 9
Views: 210
Posted By piernov
Re: Hp pavilion G6 Quanta 12 No picture .

PLTRST# comes up before POST starts.
Forum: Schematic Requests ONLY! 02-27-2021, 11:52 AM
Replies: 99
Views: 26,572
Posted By piernov
Re: Boardviews of some phones/tablets

Answer is in this thread…
https://badcaps.net/forum/showpost.php?p=983651&postcount=65
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 02-27-2021, 11:47 AM
Replies: 8
Views: 405
Posted By piernov
Re: Macbook Pro Retina 13 820-3476-A (A1502) - missing PM_SLP_S4_L

That doesn't sound right. I don't see how there can be leakage on both PP3V3_S3 and PP3V3_S0 here.

Anyway when SLP_S5#/SLP_S4# are missing, first thing is to check if they are pulsing when...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 02-27-2021, 11:39 AM
Replies: 4
Views: 134
Posted By piernov
Re: 820-4924 no chime

It's not clear what the problem is here.
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 02-27-2021, 11:36 AM
Replies: 1
Views: 77
Posted By piernov
Re: A1466 no power

https://logi.wiki/index.php/Resistance_to_Ground_List#Haswell-U

You should know by now that you have to go through the list of power rails and check which ones have voltage, which ones don't have...
Showing results 1 to 25 of 500

 
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