#1 Toshiba Qosmio X70-B-10D ARP10SQG-6050A2703101-MB-A01, Continuously reboot
przez Mobotool • 12 listopada 2020, 22:28
Hi to all, they brought to me this 17" laptop, no signs of liquid damage, no crashes outside or inside, but it has been through another "service center", they unsoldered the two usb3 blue ports (don't know why) from the mainboard and I saw that the bios chip was soldered.
No shorts on any power lines, nor on usb data lines, no scratches on main bgas, CPU, GPU and PCH, no signs of corrosion.
Initially, if you connect the power jack, power led lights up, and pressing the power button it didn't do anything, so I unsoldered the main bios chip and read it by an external programmer, and found nothing but FF inside it, so the previous service center made something wrong...however, I downloaded a correct bios file from official Toshiba website, extracted and cut the right bios bin, and sewed into the chip, then the machine began to power up by the power button, but all it does is reboot it self every 2 seconds.
I've also put a clean ME inside the bios bin, but nothing changed.
During these two seconds, I can measure many tensions rising up, on CPU (it reaches 1,65v), PCH (1.05v, 3.3v), RAM (1.32v), and almost all secondary voltages that I have found on pads (PAD6121 3.3v , PAD6150 5V, PAD6350 , PAD6300, PAD6360, PAD7101 , PAD3001, PAD6970, PAD7006, PAD6500, PAD6250).
I've opened many pads but always the same reboot happens, until I found that if I open PAD6610 (that brings 19v to CPU voltage regulator circuit) or remove the resistor connected to pin 1 of U6600 (the ENABLE pin of NCP81118) the board then stays up, and all tensions but the one on the CPU appear, even the ones on GPU and VRAM.
On this board GPU is 216-0846009, I've never changed one before but I've read that it can have problems as many other AMD GPUs, but at this stage I don't think that it can cause the reboot...do you think that it can be causing the reboot?
Sadly I've found no schematics nor boardview for this board, CPU is an Intel i7-4710HQ SR1PX so I've looked at its power sequence on another board with Haswell platform, but I don't know where to measure that signals on this board, so it's a bit tough to solve the problem, even the NCP81118 is not used so frequently in other boards, and I haven't found many references.
Here are some measurement I've taken:
(Red probe to GND, black on rail)
Tensions are measured with PAD6610 (19v to CPU circuit) open, so they are static, not rebooting
L6610 CPU 21 0.28
L6200 RAM 32 1.34
L6750 VGA 36 .084
L6300 PCH 130 1.05
PAD6350 355 1.49
PAD6360 384 3.30
L6150 5V 492 5.01
L6100 3v3 408 3.32
L6940 263 0.89
L6000 BATT CHGR 670 2.50
D4700 +3VRTC 712 3.26
L6250 VRAM 1.34
PAD7101 389 3.32
PAD3001 794 0.00
PAD6070 354 1.79
PAD7006 499 3.31
PAD6500 201 0.94
PAD900 388 3.30
PAD6220 126 0.66
Please, someone can suggest something?
What can cause a reboot like this?
No shorts on any power lines, nor on usb data lines, no scratches on main bgas, CPU, GPU and PCH, no signs of corrosion.
Initially, if you connect the power jack, power led lights up, and pressing the power button it didn't do anything, so I unsoldered the main bios chip and read it by an external programmer, and found nothing but FF inside it, so the previous service center made something wrong...however, I downloaded a correct bios file from official Toshiba website, extracted and cut the right bios bin, and sewed into the chip, then the machine began to power up by the power button, but all it does is reboot it self every 2 seconds.
I've also put a clean ME inside the bios bin, but nothing changed.
During these two seconds, I can measure many tensions rising up, on CPU (it reaches 1,65v), PCH (1.05v, 3.3v), RAM (1.32v), and almost all secondary voltages that I have found on pads (PAD6121 3.3v , PAD6150 5V, PAD6350 , PAD6300, PAD6360, PAD7101 , PAD3001, PAD6970, PAD7006, PAD6500, PAD6250).
I've opened many pads but always the same reboot happens, until I found that if I open PAD6610 (that brings 19v to CPU voltage regulator circuit) or remove the resistor connected to pin 1 of U6600 (the ENABLE pin of NCP81118) the board then stays up, and all tensions but the one on the CPU appear, even the ones on GPU and VRAM.
On this board GPU is 216-0846009, I've never changed one before but I've read that it can have problems as many other AMD GPUs, but at this stage I don't think that it can cause the reboot...do you think that it can be causing the reboot?
Sadly I've found no schematics nor boardview for this board, CPU is an Intel i7-4710HQ SR1PX so I've looked at its power sequence on another board with Haswell platform, but I don't know where to measure that signals on this board, so it's a bit tough to solve the problem, even the NCP81118 is not used so frequently in other boards, and I haven't found many references.
Here are some measurement I've taken:
(Red probe to GND, black on rail)
Tensions are measured with PAD6610 (19v to CPU circuit) open, so they are static, not rebooting
L6610 CPU 21 0.28
L6200 RAM 32 1.34
L6750 VGA 36 .084
L6300 PCH 130 1.05
PAD6350 355 1.49
PAD6360 384 3.30
L6150 5V 492 5.01
L6100 3v3 408 3.32
L6940 263 0.89
L6000 BATT CHGR 670 2.50
D4700 +3VRTC 712 3.26
L6250 VRAM 1.34
PAD7101 389 3.32
PAD3001 794 0.00
PAD6070 354 1.79
PAD7006 499 3.31
PAD6500 201 0.94
PAD900 388 3.30
PAD6220 126 0.66
Please, someone can suggest something?
What can cause a reboot like this?
