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Toshiba Satellite A60
My Toshiba has deffective RAM. memtest86 shows it.
I have taken apart the whole machine and did not find RAM separate module. It seems to me that the ram is included in the motherboard. I called the Toshiba maintenance in France (where I am ) and they told me that the memory module is separate and offer to replace it by buying a new one ! I am puzzled. Any advice on this ? |
#2
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Toshiba Satellite A60
"Sydney" wrote in message ... My Toshiba has deffective RAM. memtest86 shows it. I have taken apart the whole machine and did not find RAM separate module. It seems to me that the ram is included in the motherboard. I called the Toshiba maintenance in France (where I am ) and they told me that the memory module is separate and offer to replace it by buying a new one ! I am puzzled. Any advice on this ? If memory is not in a compartment on the base (a handy location), then it's probably under the keyboard. For sure you have a site that accepts updated modules. Maybe a quick look-see at the manual would help. J |
#3
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Toshiba Satellite A60
Sydney wrote:
My Toshiba has deffective RAM. memtest86 shows it. I have taken apart the whole machine and did not find RAM separate module. It seems to me that the ram is included in the motherboard. I called the Toshiba maintenance in France (where I am ) and they told me that the memory module is separate and offer to replace it by buying a new one ! I am puzzled. Any advice on this ? It appears that this laptop "has 256MB or 512MB on the motherboard." You can view the manual at http://209.167.114.38/support/Downlo...C/SA60EXUM.PDF If your faulty RAM is on the MB, you are going to have a serious problem overcoming it. |
#4
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Toshiba Satellite A60
Ken wrote:
Sydney wrote: My Toshiba has deffective RAM. memtest86 shows it. I have taken apart the whole machine and did not find RAM separate module. It seems to me that the ram is included in the motherboard. I called the Toshiba maintenance in France (where I am ) and they told me that the memory module is separate and offer to replace it by buying a new one ! I am puzzled. Any advice on this ? It appears that this laptop "has 256MB or 512MB on the motherboard." You can view the manual at http://209.167.114.38/support/Downlo...C/SA60EXUM.PDF If your faulty RAM is on the MB, you are going to have a serious problem overcoming it. The manual says memory exists in two places. Memory is soldered to the motherboard (256MB or 512MB). There is also a memory slot on the bottom of the computer, covered by the "memory module cover" (see page 56). You would start, using the knowledge of how much memory is present in the computer. If memtest86 says there is only 256MB or 512MB, then the computer may not have an SODIMM in the slot. It could be using just the motherboard (soldered down) memory. If the soldered in place memory is bad, you'll need a new motherboard. If the computer reports 1GB of memory, then some of the memory is on the motherboard, and the rest is the SODIMM installed on the bottom of the machine. If that was the case, you could unplug the SODIMM and run memtest86 again, to test the soldered down memory. If memtest86 passes, with the SODIMM unplugged, then you won't need a new motherboard. This is supposed to be a photo of the A60/A65, showing an added memory module. http://www.irisvista.com/tech/laptop...iba_A65_02.jpg The onboard memory is supposed to be in the upper center of the photo, under the gold colored material. I can't tell if that is an actual module, or just chips soldered to the motherboard. http://www.irisvista.com/tech/laptop...iba_A65_17.jpg http://www.insidemylaptop.com/images...otherboard.jpg Paul |
#5
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Toshiba Satellite A60
Paul wrote:
Ken wrote: Sydney wrote: My Toshiba has deffective RAM. memtest86 shows it. I have taken apart the whole machine and did not find RAM separate module. It seems to me that the ram is included in the motherboard. I called the Toshiba maintenance in France (where I am ) and they told me that the memory module is separate and offer to replace it by buying a new one ! I am puzzled. Any advice on this ? It appears that this laptop "has 256MB or 512MB on the motherboard." You can view the manual at http://209.167.114.38/support/Downlo...C/SA60EXUM.PDF If your faulty RAM is on the MB, you are going to have a serious problem overcoming it. The manual says memory exists in two places. Memory is soldered to the motherboard (256MB or 512MB). There is also a memory slot on the bottom of the computer, covered by the "memory module cover" (see page 56). You would start, using the knowledge of how much memory is present in the computer. If memtest86 says there is only 256MB or 512MB, then the computer may not have an SODIMM in the slot. It could be using just the motherboard (soldered down) memory. If the soldered in place memory is bad, you'll need a new motherboard. If the computer reports 1GB of memory, then some of the memory is on the motherboard, and the rest is the SODIMM installed on the bottom of the machine. If that was the case, you could unplug the SODIMM and run memtest86 again, to test the soldered down memory. If memtest86 passes, with the SODIMM unplugged, then you won't need a new motherboard. I have a theoretical question for you: Do you think the MB would work if the on board RAM were disabled and additional RAM were installed into the RAM slot? Most MB's adjust the RAM when polled upon start up. Supposed (and most people would never attempt to do this) the on board RAM were disabled by opening the CAS and RAS lead or even the power lead for the IC? Would the first RAM seen then be that installed in the slot? Just curious. This is supposed to be a photo of the A60/A65, showing an added memory module. http://www.irisvista.com/tech/laptop...iba_A65_02.jpg The onboard memory is supposed to be in the upper center of the photo, under the gold colored material. I can't tell if that is an actual module, or just chips soldered to the motherboard. http://www.irisvista.com/tech/laptop...iba_A65_17.jpg http://www.insidemylaptop.com/images...otherboard.jpg Paul |
#6
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Toshiba Satellite A60
Ken wrote:
Paul wrote: Ken wrote: I have a theoretical question for you: Do you think the MB would work if the on board RAM were disabled and additional RAM were installed into the RAM slot? Most MB's adjust the RAM when polled upon start up. Supposed (and most people would never attempt to do this) the on board RAM were disabled by opening the CAS and RAS lead or even the power lead for the IC? Would the first RAM seen then be that installed in the slot? Just curious. That is a good question. Based on the way regular motherboards, chipsets, and BIOS work, I would say there is no special dependence on soldered down memory. The situation could be quite different for some older equipment. But modern stuff doesn't really care which slots are populated. As far as I know, you don't need RAM to start the boot process. And the Northbridge is likely disabled, as far as memory operation goes, and is turned on by some of the BIOS code. That is why there should be more flexibility about what bank(s) have to be working. You'd have to be careful, with respect to what you cut. If you have a "private" signal on the memory bank you can play with, that might be OK. But snipping any controlled impedance, bussed signals would be a more dangerous proposition. Still, I like your idea. If you could figure it out, then chances are you could try exactly what you suggest. One thing I can't tell you, is whether a modern BIOS is dependent on having a working SPD chip or not, for each slot. The BIOS actually has two ways to config/test memory. It can use the SPD EEPROM and the declared config information, to understand what size memory is installed. But the BIOS can also do probes on the memory, to verify the size (that is how the BIOS can properly configure a computer, even when the contents of the SPD are wrong). What I can't tell you, is whether the hooks are still in the BIOS, to do Plug and Play based purely on probing. If it had the capability to probe, then disabling the SPD chip would not be enough to prevent the memory from being detected. And then you'd have to go after something like a CS#. The soldered down memory might have an SPD chip, which is what I'd attack first. Followed by looking for something like CS#. Since I don't know what hides under that "gold colored material" in the pictures, I don't know how difficult it would be to disable the memory on the OPs board. We'd really need to see a closeup photograph of what is underneath. If it was just a regular SODIMM, the removal/disabling might be rather easy. I don't really see much advantage to the manufacturer soldering memory chips right to the motherboard, because of the danger the memory might not pass on a factory memory test. It would be more of an advantage for the memory to be modular and removable. Paul |
#7
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Toshiba Satellite A60
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