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| sony (mbx-226) not trun on https://vlab.su/viewtopic.php?f=55&t=17714 |
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| nasser_pczone [ 16 дек 2013, 00:22 ] | |
| Заголовок сообщения: | sony (mbx-226) not trun on |
Hi , the machine does not start when i press the power button , I got the green light led and device turn on but after 2 seconds turn off again this cycle for ever mbx- 226 model: vpccw21fx Things I do 1 - PCB services and connections 2 - BIOS update with interchangeable iC 3 - Ec Update with interchangeable iC 4 - Replace the I / O 5 - check the battery voltage and the power button OK 6 - resold graphics chip 7 - resold charging IC 8 - test new processor 9 - Change the ram 10 - no cut or damage PCB I really mix up, what else, sometimes boot well but after 5 min not boot again and green power for 2 second and ........ , and possibly / / Thank you all in advance please |
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| Dejmos [ 16 дек 2013, 19:43 ] | |
| Заголовок сообщения: | Re: sony (mbx-226) not trun on |
LPC activity? |
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| nasser_pczone [ 16 дек 2013, 22:11 ] | |
| Заголовок сообщения: | Re: sony (mbx-226) not trun on |
thank for your answer whats your mean ? LAD3, LAD2, LAD1, LAD0, CLK, RST, FRAME, +3v & GND. ?????. i not wired that yet ? but on PCI-E no result this device restart in 2 second ... |
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| arashhamidpour [ 17 дек 2013, 00:28 ] | |
| Заголовок сообщения: | Re: sony (mbx-226) not trun on |
chek 3.3v on swich power and the pin 5 bios is not to group and usb 5v not to gerand must 3.3v on batty pin if this not may be the ic charg problem when put buttry you see bottry light? check with the full battry and try to power check 3.3v and 5v must is not gerund !!!!! may be ic 3.3 and 5 must be replace and chek the bios some of the sony when bios crash all of voltaj is down check bios may be south brigh must be replace ask the customer how to do and your notebook is not work is used usb port???? is work in iternet a lot???? |
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| nasser_pczone [ 17 дек 2013, 01:09 ] | |
| Заголовок сообщения: | Re: sony (mbx-226) not trun on |
arashhamidpour писал(а): chek 3.3v on swich power and the pin 5 bios is not to group and usb 5v not to gerand must 3.3v on batty pin if this not may be the ic charg problem when put buttry you see bottry light? check with the full battry and try to power check 3.3v and 5v must is not gerund !!!!! may be ic 3.3 and 5 must be replace and chek the bios some of the sony when bios crash all of voltaj is down check bios may be south brigh must be replace ask the customer how to do and your notebook is not work is used usb port???? is work in iternet a lot???? سلام اقا آرش 1-3.3v on power key and pin 5 bios is 2-usb no shorted 3-battry have 3.3v 4-i test with full battery no result 5-3.3 not grounded with 5v 6-i changed bios ic and firmware but no result 7-south is ok 8-customer just say happen unexpected |
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| nasser_pczone [ 18 дек 2013, 00:46 ] | |
| Заголовок сообщения: | Re: sony (mbx-226) not trun on |
today when i get the PQ23 out from board mainboard work without restart but when i change that no result and restart again i thing all problem is from cpu PWM circuit but how i check ? |
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| nasser_pczone [ 19 дек 2013, 00:01 ] | |
| Заголовок сообщения: | Re: sony (mbx-226) not trun on |
the trouble in PWM circuits some fet SIR428 i need to change ..can i change fet with another fet without match number like pc mainboard ????? ( in pc mainboard every fet response when i change without match ... |
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