Alienware M14x R2 with 7 beeps error

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

fix the CPU_VCore circuit.

What voltage should PL703, PL704, and PL705 be showing?

[caspian]

Re: Alienware M14x R2 with 7 beeps error

they should be about 1 volt.

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

they should be about 1 volt.

Seeing my original readings where 0.9mV for those three should they be right? Or should they be on the higher side around 1.2V? I haven't had time yet to do any new testing with the LCD cable on.

[caspian]

Re: Alienware M14x R2 with 7 beeps error

was it 0.9mV or 0.9V?
if 0.9mV, it is considered as no voltage.

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

was it 0.9mV or 0.9V?
if 0.9mV, it is considered as no voltage.

Ah ok, I'm sure it was 0.9mV, I'll have to confirm in a few days when I get some free time :-)

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

I'm getting 0.0mV across PL703, PL704, PL705 with and without the LCD connected, so I'm not sure how I got the last readings, what should I test next?

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

PC733, PC734, and PC766 are 25V 100U caps that had around 10V in them each when turned on then over roughly 30secs they rose to 17V each before I powered down, does that sound right?

[caspian]

Re: Alienware M14x R2 with 7 beeps error

there is no PL705 and PC766 on this board.
first measure voltage on all pins of PQ700 after turning on.
then, measure voltage on all pins of PU700 if you got time.

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

What do you mean, PL705 and PC766 are both on page 59, are you useing the schematics I posted in post #9? My schematics don't have PQ700 and PU700.

[caspian]

Re: Alienware M14x R2 with 7 beeps error

PC733, PC734, and PC766 are 25V 100U caps that had around 10V in them each when turned on then over roughly 30secs they rose to 17V each before I powered down, does that sound right?

I found them.
yes 17v is normal for that point.
remove the battery from your laptop until you fix it.
now measure voltage on all pins of PU701 after turning on.
avoid shorting neighbor pins together.

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

remove the battery from your laptop until you fix it.

The Cmos battery?

[caspian]

Re: Alienware M14x R2 with 7 beeps error

no, remove the main battery.
if you remove the cmos battery, it would be safe too.

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

no, remove the main battery.
if you remove the cmos battery, it would be safe too.

The board is out of the casing as the components being tested are on the bottom of the board.

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

I'm still testing but I get slight fluctuations each time the 7 beeps start

[caspian]

Re: Alienware M14x R2 with 7 beeps error

to make sure, measure voltage on all the 3 pins of PQ1.
and read the voltage written on the AC adapter brick.
also measure voltage on PL302 after turning on.

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

PU701
1 - 0.6mV
2 - 0.6mV
3 - 0.6mV
4 - 0.1mV
5 - 0.844V
6 - 1.060V
7 - 0.978V
8 - 1.060V
9 - 3.290V
10 - 0.2mV
11 - 0.9mV
12 - 0.9mV
13 - 0.9mV
14 - 0.9mV
15 - 0.9mV
16 - 0.9mV
17 - 0.9mV
18 - 0.2mV
19 - 19.5mV when not beeping, 19.9mV when 7 beeps are sounding
20 - 2.256V when not beeping, flashes between 2.256V and around 2.201V when 7 beeps are sounding
21 - 0.9mV
22 - 0.9mV
23 - 0.1mV
24 - 1.350V when not beeping, flashes between 1.350V and around 1.310V when 7 beeps are sounding
25 - 2.575V when not beeping, flashes between 2.575V and around 2.490V when 7 beeps are sounding
26 - 2.576V when not beeping, flashes between 2.576V and around 2.490V when 7 beeps are sounding
27 - 0.9mV
28 - 0.9mV
29 - 0.9mV
30 - 2.264V when not beeping, flashes between 2.264V and around 2.220V when 7 beeps are sounding
31 - 2.267V when not beeping, flashes between 2.267V and around 2.213V when 7 beeps are sounding
32 - 0.5mV
33 - 0.5mV
34 - 0.1mV
35 - 1.344V when not beeping, flashes between 1.344V and around 2.220V when 7 beeps are sounding
36 - 0.5mV
37 - 0.1mV
38 - 0.5mV
39 - 0.5mV
40 - 0.5mV

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

to make sure, measure voltage on all the 3 pins of PQ1.
and read the voltage written on the AC adapter brick.

PQ1 has no component from factory, what do I do with it?

[Johndill]

Re: Alienware M14x R2 with 7 beeps error

also measure voltage on PL302 after turning on.

PL302 was around 0.2mV to 0.0mV, not sure if those readings are wright, will have dinner and come back :-)

[caspian]

Re: Alienware M14x R2 with 7 beeps error

PQ1 has no component from factory, what do I do with it?

instead, measure voltage on PL102.

[caspian]

Re: Alienware M14x R2 with 7 beeps error

now measure voltage on PL205 and PL202.