motherboard cpu power section check

Ok it's got two cores. Reason I asked was disabling say a 2 ghz single core HT CPU can acutally boost performance. When in HT mode the RAM and the CPU process at 1 ghz.

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Meat Plow
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After the "cpu disabled trick" worked well for hours, with laptop running and restarting with it PSU, I had no more luck. The day after it didn't start as before. Tried the trick again, I even disabled both cpus in devmgmt but no luck. Used an hardware monitoring program to investigate situation but nothing helps, only curious thing is that trying to access ACPI temperature values the pc suddenly powered down.

Even when all seems running weel on battery, or "fake battery" with

12V PSU, the pc freezes at a point in some conditions that I still have to determine, but to me this shows it's an hardware fault. When running on normal PSU in Windows 7 I tried to change the options for the power/tilt/sleep buttons and the pc freezed, and that was when it didn't worked any more that way. Power buttons options can be changed without problem running on battery. On battery the pc can run for hours, but it seems that stressing it a bit and leaving it alone leads to a freeze or a sudden power down, maybe when the power management decides to do something, something that I cannot know as I simply find the pc hanging on or completely powered off.

I must check the motherboard, but except for ONE capacitor in the power section that is 3 or 4 mm big (and still smd) all others are small SMD, and you can just identify them by being marked C as I think all resistors are R.

The problem is I need to find a day with plenty of time, as to test those capacitors needs to unweld them with hot air check and solder them again, and they are soooo small... there are smd three-legs transistor components too, but I do not think I would be able to check them.

Maybe I should start with the few fuses and resistors as they can be checked in place to see if they are opened, at least.

Reply to
Mike De Petris

You seem to have a decent strategy in place. Have you thought about installing a software program that can monitor CPU core and other voltages? I've used Motherboard Monitor on desktops, it may work on your Intel based board. And it's a free utility.

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All motherboards have some sensors and/or other ACPI based sensors.

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Reply to
Meat Plow

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thank you, I tried one but didn't give me voltages, all other values are normal, accessing ACPI temperatures leaded to a sudden power off, will have a try with other monitoring software

in the while I'm also looking a cheap compatible CPU, I am still not that sure it's a mainboard fault

Reply to
Mike De Petris

Monitor.s...

I'd have to assume that Toshiba still uses a proprietary ACPI interface. My Satellite 1905-S301 has it's own Toshiba power management console.

I doubt it's the CPU but rather the ACPI hardware. If it is the CPU and you get a cheap replacement that would be great, I would be wrong and it wouldn't be the first time.

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Reply to
Meat Plow

Monitor.s...

I'd have to assume that Toshiba still uses a proprietary ACPI interface. My Satellite 1905-S301 has it's own Toshiba power management console.

I doubt it's the CPU but rather the ACPI hardware. If it is the CPU and you get a cheap replacement that would be great, I would be wrong and it wouldn't be the first time.

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Live Fast, Die Young and Leave a Pretty Corpse
Reply to
Meat Plow

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I will give it a try as I found a cheap CPU, I'll test it and will resell it in case, but at least I will be sure mine is ok.

As "ACPI hardware" seems to be guilty, where should I look for on the motherboard and what should I check first? There are so many small capacitors around... may it be a custom chip?

Reply to
Mike De Petris

Good question. Maybe a program like Belarc Advisor could tell you what device(s) is/are responsible. I think it's another freeware app so you may check it out.

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Reply to
Meat Plow

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what can we say from this:

Computer Profile Summary Computer Name: W (in WORKGROUP) Profile Date: marted=EC 17 agosto 2010 19:48:57 Advisor Version: 8.1m Windows Logon: mike

Operating System System Model Windows 7 Ultimate (build 7600) Install Language: English (United States) System Locale: Italian (Italy) TOSHIBA Satellite A205 PSAF0U-01Q009 System Serial Number: 37252508Q Enclosure Type: Other Processor a Main Circuit Board b

1,73 gigahertz Intel Core 2 Duo 64 kilobyte primary memory cache 2048 kilobyte secondary memory cache 64-bit ready Multi-core (2 total) Not hyper-threaded Board: Intel Corporation CAPELL VALLEY(NAPA) CRB BIOS: Phoenix Technologies LTD 5.20 10/25/2007 Drives Memory Modules c,d 79,92 Gigabytes Usable Hard Drive Capacity 67,18 Gigabytes Hard Drive Free Space

ST980210AS [Hard drive] (80,03 GB) -- drive 0, s/n 5QY0S80G, rev

3.ALC, SMART Status: Healthy 1016 Megabytes Usable Installed Memory

Slot 'M1' has 512 MB Slot 'M2' has 512 MB Local Drive Volumes

c: (NTFS on drive 0) 79,92 GB 67,18 GB free Network Drives None detected Users (mouse over user name for details) Printers local user accounts last logon mike 17/08/2010 07:21:31 (admin) local system accounts Administrator 14/07/2009 06:53:58 (admin) Guest never HomeGroupUser$ 17/08/2010 19:05:41

DISABLED Marks a disabled account; LOCKED OUT Marks a locked account

Microsoft Shared Fax Driver on SHRFAX: Microsoft XPS Document Writer on XPSPort: Controllers Display ATA Channel 0 [Controller] ATA Channel 1 [Controller] Intel(R) 82801GBM/GHM (ICH7-M Family) Serial ATA Storage Controller -

27C4 Mobile Intel(R) 945 Express Chipset Family [Display adapter] (2x) Generic PnP Monitor (15,4"vis) Bus Adapters Multimedia Texas Instruments PCI-8x12/7x12/6x12 CardBus Controller Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27C8 Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27C9 Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27CA Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27CB Intel(R) 82801G (ICH7 Family) USB2 Enhanced Host Controller - 27CC High Definition Audio Device Virus Protection [Back to Top] new Group Policies Microsoft Security Essentials Version 2.1.6805.0 Scan Engine Version 1.1.6004.0 Virus Definitions Version 1.87.1998.0 Realtime File Scanning On None discovered Communications Other Devices

Marvell Yukon 88E8039 PCI-E Fast Ethernet Controller primary Auto IP Address: 192.168.178.29 / 24 Gateway: 192.168.178.1 Dhcp Server: 192.168.178.1 Physical Address: 00:A0:D1:72:93:47 Microsoft ISATAP Adapter Teredo Tunneling Pseudo-Interface

Networking Dns Server: 192.168.178.1 Texas Instruments 1394 OHCI Compliant Host Controller Microsoft AC Adapter Microsoft ACPI-Compliant Control Method Battery Microsoft Composite Battery HID-compliant consumer control device HID-compliant device USB Input Device (2x) HID Keyboard Device Standard PS/2 Keyboard SDA Standard Compliant SD Host Controller USB Composite Device USB Root Hub (5x) Generic volume shadow copy

Reply to
Mike De Petris

8.1m

(NAPA) CRB

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Unfortunately I don't see any specific mentioning ACPI hardware except the battery.

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Reply to
Meat Plow

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I have just read this:

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will try an XP installation.

Reply to
Mike De Petris

false#M5279

So it's a problem with Win 7 and Vista? It would then seem as though Toshiba has gotten away from proprietary ACPI drivers and its own control panel and moved to letting Windows ACPI do the job. This may be a bug in Vista / Win 7 ACPI when certain hardware is present and Windows provide the driver for the interface. Let us know what XP does for you.

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Reply to
Meat Plow

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I will have a try but needs time, anyway I'm skeptical as the pc do not boot at all, I don't know if there are any ACPI settings that are stored in the CMOS even if BIOS has no settings for them, but who knows?

Reply to
Mike De Petris

CAPELL

Depends in the CMOS/BIOS. Some have very limited adjustments. Some might have ACPI settings. So the thing doesn't boot on AC power? That's not a software issue. That's a problem with onboard battery management. Or possible a slight corruption in the BIOS code.

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Reply to
Meat Plow

yes it boots with battery only, as soon as I connect the AC cord it freezes, even in the BIOS, and if it is connected from the beginning LEDs light up, fan starts, display flashes a while but nothing more

anyway, when I disable a CPU from device manager in safe mode, the pc worked well all the day, even shutting down and restarting, until I used a software tool to read ACPI temperatures, at that point it suddenly powered off and all was like before

Reply to
Mike De Petris

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