I've got 2408WFPb with the same problem. Backlight comes on, power LED is green but the screen is blank. No OSD.
The voltages on T-con seem to OK (1.8V at IC19, 3.3V at IC21, 2.5V at IC7 & IC9, 15.15V at CC20..CC24).
The delay when turning off is also present - it might indicate a problem on the main board (unless the T-con communication is bi-directional).
Rainbow
Badcaps Legend
Last Activity: 02-18-2025, 08:32 AM
Joined: 08-25-2005
Location: Slovakia
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The firmware updaters don't work - "Error: The System TPM Query Failed, Aborting".Leave a comment:
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I've got a Vostro 15 5568 (LA-D821P board) with the TPM problem. ME works fine (can get data using MEInfo, the firmware is 11.8.92.4222 LP - the latest from 1.20.0 BIOS).
Downgrading the BIOS only avoids the "TPM device is not detected" alert - TPM will not work. After downgrading to 1.8.0, you can upgrade to 1.11.0 - the latest BIOS that does not have the alert.
Tried moving RC1130 to RC1131 to change TPM_ID from HW_TPM to SW_TPM but the alert was still present.
Looks like the TPM chip UZ13 (Nuvoton NPCT650JBAWX) is faulty (or has corrupted firmware)...Last edited by Rainbow; 01-30-2025, 07:36 AM.Leave a comment:
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To fully restore system IDs, the AsusGpnv region must be recreated (if it can't be copied from a corrupt BIOS). Start of AsusGpnv area (Base: 3E2000h) and size (10000h) can be found using UEFITool NE: Intel Image -> 2nd BPDT region -> Secondary BPDT -> OB -> AsusGpnv
Also the BIOS from web has unlocked descriptor (replace first 4KB from some dump).
AsusGpnv contains:[LIST][*]MAC address to show in BIOS - from the smaller sticker on the back of the board or from the network interface - it's stored inside RTL8402 (eFuse) and thus correct even with empty AsusGpnv[*]UUID...Leave a comment:
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No backup, unfortunately. The flash was blank.
I've downloaded two real dumps here - "E402N.rar" and "sus E402MA ORI.rar". They're versions 302 and 301 so they can't be compared completely. However, the differences reveal location of serial numbers and product keys - I'll probably just change them using a hex editor and copy the area to the new BIOS.Last edited by Rainbow; 01-21-2025, 04:09 PM.Leave a comment:
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The "dump" in ASUS E402NA.304.rar is the same as 304 BIOS from Asus website (minus the first 2048 bytes). WBT.exe does not seem to work. Do I need a real dump for that? Can WBT also set windows product key or should I use something other (UEFITool)? I extracted it from installed Windows.Leave a comment:
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Flashed dump from ASUS E402NA.304.rar. Laptop powered up and boots! The EC internal flash is probably OK. Maybe it reads code from SPI flash.Leave a comment:
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I have Asus E402NA REV. 2.3 that's completely dead. No LEDs, not charging, not powering up. +5VA and +3VA are present. I've desoldered the flash and it's completely empty. Only FFh everywhere. Maybe the IT8995E-128 is empty too?Leave a comment:
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Thanks for sharing this method, Maxpower3!
I've just recovered two ThinkPads E14 Gen 1 (Intel) - NM-C421 board with IT8227E-256 EC.
There's no debug connector on this board so I soldered a wire to unpopulated C0705 (LPC_AD3), which is conveniently located on the top side of the board. The other end of the wire is grounded through a tactile button.
The correct moment to press the button is immediately after the Lenovo logo appears. If pressed too late, fan error will appear. I once got into SETUP with only the Config tab present - rebooted and retried and...Leave a comment:
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This programmer seems to use ITE DBGR interface over I2C/SMBus. There's no documentation available but there is some code:
iteflash: [url]https://chromium.googlesource.com/chromiumos/platform/ec/+/HEAD/util[/url]
I2ITE: [url]https://github.com/c0d3z3r0/i2ite[/url]
Both are using FTDI chips so there's no need for a special programmer.
Seems that the DBGR interface is activated by sending some magic (not valid I2C) data to the EC. Then it works like a regular I2C device, supporting both reading and writing the flash.https://This programmer seems to use...ver I2C/SMBus.Leave a comment:
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If the webcam is detected as 0c45:6310 and does not work, the webcam firmware is corrupted or erased (the flash was blank on mine).
label: Camellia_2G CN0314-SN30-OV03-5
chip: SONIX SN9C230CJG
flash: MX25L512MC (64KB)
To reflash firmware, get CCD_Suyin_v5.8.33.501_XPX86.zip.
Unzip, run USBBridgeBurnerAp_v1.1.4.0.exe from "Suyin Firmware R02.03.02" folder inside and click the "EZ GO" button.
Wait for flash to complete and power cycle the laptop..
Camera is now detected as 064e:a103 and works fine!Leave a comment:
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Almost complete conversion, incuding Radeon removal and working HDMI. The only exception is RT8202A_VGA_CORE which is kept to power VCC_GFXCORE.
("p3" means schematic page 3)
[CODE]p3: move R260 (10K) to R254 - PCLKCLK4 strap
add RN44, RN76 (2x0R) - DREFCLK/DREFCLK# and DREFSSCLK/DREFSSCLK#
p7: remove R162 (0R), add R161 (1K) - CRT_IREF
remove C213 C220 C222 C228 C229 C233 C234 C237 C239 C245 C253 C259 C264 C265 C266 C269 C647 C648 C651 C654 C657 C658 C660 C663 C664 C666 C667 C671 C672 C679 C680 C686
move C593, C591, C587, C583, C559, C554,...Leave a comment:
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LCD stopped working again after adding RN30 (I didn't have 150R resistor network before), but this time including backlight. But only in BIOS - LCD turns on when booting Linux. Linux also sees a phantom VGA monitor connected.
The problem is caused by resistance of VGA RGB signals being too low (50 ohms), causing BIOS to detect a fake VGA monitor connected. The low resistance is caused by R569, R570, R572 under Radeon. Removed them and LCD works fine again.Leave a comment:
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Found it! Installed RN14 pull-ups for HDMI EDID and LCD now works!
Looks like the BIOS tries to read EDID from HDMI first and when it fails, it does not read EDID from LCD either.Leave a comment:
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LCD panel is original - InnoLux BT156GW01 V.2 (40-pin LVDS LED), cable = Wistron JV50 LED+CCD CABLE P/N: 50.4CG14.022 REV:A02Leave a comment:
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I've done the conversion on JV50-MV M92 MB (DDR2) because I was getting D2 POST code. If Radeon is not desoldered, you need to remove at least C213/C220 or the system will still detect the Radeon and hang at D2. After that, I got display on VGA port and I can boot! But LCD does not work. Backlight and LCDVDD turn on but the display remains blank.
Booted Linux and there are "[drm:intel_plane_destroy [i915]] *ERROR* Couldn't find PLL settings for mode!" errors in the kernel log during boot and anytime I try to enable the internal LCD (xrandr --output LVDS1 --mode 1366x768)....Leave a comment:
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Re: DELL XPS 15-9530 LA-9941P VAUB0 slow charging
Yes, it was another crap. Discharge lasted only 1 hour (with CPU loaded), then charged normally again (voltage rising slowly).
Bought another battery. Looks same as the first one except one sticker - but this one works. And seems to work well - it's charging over 30W and charges up to 13.2V. Looks like it has 4.4V cells.Leave a comment:
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Re: DELL XPS 15-9530 LA-9941P VAUB0 slow charging
It worked exactly once. The battery charged to 100% and then I turned off the laptop and disconnected adapter.
Now I powered it up and the battery was only around 10%!
Connected adapter, the voltage rised to about 12.4V, charging power started around 20W and keeps decreasing. Much less than with the first battery, it's now around 11W and battery at 24% but it still does not look right.
Another crappy battery?Leave a comment:
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Re: DELL XPS 15-9530 LA-9941P VAUB0 slow charging
Bought the cheapest battery available (only 4400mAh instead of 5500mAh) in a local shop. The connector is very hard to plug but guess what? It's charging!
It was completely discharged (around 8V) but the voltage is slowly rising (currently at 11.35V), Linux shows 22W charing power and percentage rises (currently 10%).
The first "new" battery was clearly bad - high internal resistance. The 12.3 voltage is too high (at the same current) and looks like there's some charging algorithm in EC that...Leave a comment:
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Re: DELL XPS 15-9530 LA-9941P VAUB0 slow charging
Charger (bq24715) register 0x12 is set to 0xE4CC, which means fixed IOUT pin with "40x adapter current amplifier output" value. This pin is connected (as ADP_I) to EC. It goes up to 0.6V after plugging, then decreases as charging slows down. 0.6V seems to be OK (0.6V/40 = 0.015V, Rsense=0.01R, I=0.015V/0.01R = 1.5A).
As the current is reduced by a command from EC, it rules out the charger.Leave a comment:
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