Dear All,
Hello !

I am looking for a solution to a dead HP DV6-1235ee laptop with the following motherboard:
Foxconn
ML1-H94V-0E253117
168UT30001-094D
quanta ut3 schematics

PU1:: ISL6262
PU2:: RT8206B
PU3:: 8119LN
PU4:: P2805
PU5:: ISL6251

som of the voltages i measured:
DC jack = 19.93V
+VA = 19.90V
+VAD = 19.71V
+VIN = 19.71 V
+5VPCU = 5.25V
+3VPCU = 3.45V
+5VALW = 5.25V
+12VALW = 8.70V ?? is it fine or is overloaded somewhere?

Voltages At EC (KB3926)
9, 22, 33, 67, 96, 111, 125 (3VPCU) = 3.4V
037 3920_RST# = 3.3V
127 LID_EC# = 3.25V
086 ACIN (ACIN_1) = 3.1V

019 NBSWON#1 =3.4 / 0V (before /after power button)
090 DNBSWON#1 3.4 / falls to 0.2V gradually rises to 0.5V and settles there

95 RSMRST# 0V / 2.8 V only for half a second when you press the power button and then falls back to 0V

16 SUSC# 30 mV / 275mV again falls to 30 mV
06 SUSB# 30 mV / 550 mV again falls to 30 Mv

BIOS ( U22 sheet no 34)
Pin no. name voltage
1 BIOS CS# 0.18 V isnt it too low?2 BIOS RD# 1.64 V
3 SPI 3P 3.4 V
4 VSS 0 V
5 BIOS WR# 0.25 V
6 SPI CLK 1.5 V
7 SPI 7P 3.4 V
8 VDD 3.4 V


I would request you to kindly let me know what is going wrong which is preventing the rsmrst voltage from getting high. it tries to go high but falls down immediately to zero.

I dont know what to do now. kindly show me the path to tread.

thanks in advance.

Must be +12V - check PD12, PD13, PC62, PC63, PC70, PC71

Update bios on the programmator. If RSMRST# zero too - replace EC.

Dear Sir,

Thanks for your quick reply. I checked the components around PD12 and PD13 and they are fine. nothing wrong with them.

someone told me that this +12ALW supply can be low in the starting and will become +12V only after the laptop has booted up........ as per him this +12V can not be reason behind the DEAD laptop.

But, when i see page no 43 of the schematic, (Discharge/3VS5/5VS5) its hard to believe that +12V is not needed. Because MAINON, SUSON, S5_ON............. etc all are connected to this +12VALW. so, i am not sure about the role of +12VALW supply at startup.


Secondly, the rsmrst is 0V when the power button is not pressed.
when the power button is pressed, rsmrst becomes 2.8V for half a second but then again falls down to 0V. I think there is some short etc due to which the supply shuts down itself as safety mechanism.

I request you to kindly guide me about the possible reason behind this .

Regarding the BIOS, the pin 1 is low. is it a corrupt BIOS or possibly bad EC.

Please guide about this so that i can reach the fault by measuring voltages stage wise...


many thanks for taking interest in my problem.... written not in your language....

really appreciate this.

thanks again

First: replace EC and program bios.

Dear sir,

being a new user, I was not allowed to post a reply earlier. Kindly bear with me.

I find this forum extremely useful and very very active. the only problem is language. i hope language will not be an obstacle.

sir before replacing EC i want to be doubly sure that that EC is faulty. thats why i wanted to check the power supplies.

and can we just remove the bios and switch on the motherboard?? can that tell if bios is ok or not?

Sir please guide me about the points at which i can measure voltages / signals to pin point the problem.


thanks all of you for your valuable comments.

If RSMRST# not work properly - is bad EC or bad SourthBridge.
Therefore I offer program Bios, replace EC. Otherwise replace SourthBridge.

Dear sir,

it seems EC is trying to initiate by setting RSMRST# to high but South Bridge is not allowing to do so.......... because of some unknown reason.
Is southbridge detecting some other conditions too…. Which are not ok?
Sir can we first remove bios then start the motherboard ………to check if it’s a bios problem or EC problem?
I want to know which component is faulty and then buy only that ………. Here they don’t take the unused components back.
please help me
Posted after 1 hour 27 minutes 51 second:
sir sus c anad susb are also low.

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Posted after 3 hours 4 minutes 41 second:
Dear Sir,

Could you help me with working dump for quanta ut3. / hp dv6 1235ee/

thanks

In support site: http://h10025.www1.hp.com/ewfrf/wc/soft ... 82377#N617