HP 630 only power led lights up

[kandyan]

hi guys i am new to this forum. but i hv seen many useful posts here.
First of all i hv moderate knowledge in electronics. Therefor i repair notebooks for fun n for my pocket money.


last week my friend brought me a laptop with following symptoms:

HP 630 Core i5 with Chicago_HR_HPC

When i plugged in charger DC jack lights on
after pressing power power light turns on but nothing else.
no fan , no display ,no thing other than lighting up power led laptop seems almost dead.

According to the power sequence:

3.3vAL/5vAL and 3.3vA/5vA lines up n running
PWR_SWIN# -- ok -- lights up
RSMRST# -- 3.3V (always shows 3.3v no change when pressed power button)
EC_PWRBTN# - 3.3v/0v (it shows 3.3v before pressing power button after it shows 0v)

SLP_S5#_3R - ? (schemetics says it is the next thing to check which says sending S5 signal to SB to EC)

SLP_S4#_3R - nothing

SLP_S3#_3R - nothing

from that point everything stops.

Therefore i assuming that BIOS chip doesn't involve in this case Bcz it wont power up whereas S3# signal not coming out from south bridge.

I want to knw is this voltages are ok and how to check S5.

Also i hv already reflowed south bridge to make sure HP laptops south bridge problem is not the reason for this problem.

i think EC (IT8518) is bad bt before i replace it i want to knw what you guys suggesting ......
thanx .....................

[robrock1]

Re: HP 630 only power led lights up

If you had oscilloscope you could measure bios ic and see if its communicating with EC, if not need to reflash or replace EC. I think the RSMRST signal should go if its on it means the whole circuit is still in reset which means cpu not working, bios not reading, no communication between ec and southbridge. If you had mini pci diagnostic card you could just slot it in and see if any readings, it will also show you the reset led and clk and so on. Try and reflash the bios first, before you do any other steps.

[kandyan]

Re: HP 630 only power led lights up

If you had oscilloscope you could measure bios ic and see if its communicating with EC, if not need to reflash or replace EC. I think the RSMRST signal should go if its on it means the whole circuit is still in reset which means cpu not working, bios not reading, no communication between ec and southbridge. If you had mini pci diagnostic card you could just slot it in and see if any readings, it will also show you the reset led and clk and so on. Try and reflash the bios first, before you do any other steps.

Thanx for the quick reply.
I have already checked bios chip and +3.3S (sus volatage) doesn't come there to power up the bios chip. I think which means south bridge is not producing 3.3v sus voltage due to lack of communication with EC.

[Francisco.s]

Re: HP 630 only power led lights up

I have already checked bios chip and +3.3S (sus volatage) doesn't come there to power up the bios chip. I think which means south bridge is not producing 3.3v sus voltage due to lack of communication with EC.

You should check EC SPI ROM, (UI2) (MX25L4006EM1I-12G) and its pin 8. (+V3.3AL)
If it is powered, reprogram it.
(I used hp_compaq_presario_cq43_cq57_foxconn_chicago_rev_mv schematic)

[kandyan]

Re: HP 630 only power led lights up

You should check EC SPI ROM, (UI2) (MX25L4006EM1I-12G) and its pin 8. (+V3.3AL)
If it is powered, reprogram it.
(I used hp_compaq_presario_cq43_cq57_foxconn_chicago_rev_mv schematic)

Thanx Mr Francisco,

yeap its powered n i am planning to reprogram it.

HP 630 MB model - FOXCONN CHICAGO_HR_HPC
UI2 - MX25L4006EM1I-12G

But i am new to programming ROM chips and could you plz direct me to a tutorial page if theres one.

[Francisco.s]

Re: HP 630 only power led lights up

But i am new to programming ROM chips and could you plz direct me to a tutorial page if theres one.

In the following link, you have instructions to make a diy programmer.
http://write-code.blogspot.com.es/20...l#.UpHaKSdNlK8

[kandyan]

Re: HP 630 only power led lights up

In the following link, you have instructions to make a diy programmer.
http://write-code.blogspot.com.es/20...l#.UpHaKSdNlK8

Got it. I went through every page n it seems can be done with my noobie knowledge in SPI programming.
Anyway i also found CQ43 not working MB which also has same SOIC-8 WinBond chip.So i think i shall gv a try replace it before doing reprogramming.

[dycc]

Re: HP 630 only power led lights up

I think you have to check first if the southbridge is supplied before. Because if not it will not respond with s3 signal

[dycc]

Re: HP 630 only power led lights up

Sorry now i got it . Ec_pwrbtn# must be low (0v) and then up (3.3v) when you press power button. Rsmrst# signal is good.

[kandyan]

Re: HP 630 only power led lights up

Sorry now i got it . Ec_pwrbtn# must be low (0v) and then up (3.3v) when you press power button. Rsmrst# signal is good.

Yeap RSMRST# signal is ok and EC SPI ROM replace but nothing good so far. very strange problem. planning to replace the EC.

[dycc]

Re: HP 630 only power led lights up

Please could you share ec bios .

Got one and ec bios is bad

[bucephalus]

Re: HP 630 only power led lights up

You should check EC SPI ROM, (UI2) (MX25L4006EM1I-12G) and its pin 8. (+V3.3AL)
If it is powered, reprogram it.
(I used hp_compaq_presario_cq43_cq57_foxconn_chicago_rev_mv schematic)

My laptop motherboard DAFM9CMB8C0 Rev:C PWB:A00 have two chip
1) FLASH 1 MBytes For EC ----> MX25L8005M2C
2) FLASH 4 MBytes For PCH ----> W25X32VSSIG

3v/5valw is present

When power buttom is pressed

SIO_PWRBTN# have 2.8v goes to 0v
ICH_RSMRST# have 0v goes to 3.15v then again 0v
SIO_SLP_S5# have 0v goes to 3v then again 0v
SIO_SLP_S3# have 0v goes to 3v
+RTC have 3v

Flash for EC have +3v on pin 8
Flash for PCH have 0v on pin 8 because of no +3v_Run voltage

Problem Motherboard fails to power on. is it possible that the bios is corrupt ?

i am confused.... do i have two reprogram both chips or EC chip only.
i have two bin files EC.bin 1024KB and PCH.bin 4096KB

please help and reply
Thanks